this page has 2 code blocks to process the transaction through paypal, it should only have 1, you can probably delete the code from lines 201 - 352:
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$PP_DirectPayment_required = array();
$PP_DirectPayment_required[0] = array();
$PP_DirectPayment_required[1] = array();
$PP_DirectPayment_itemized = array();
$PP_DirectPayment_itemized[0] = array();
$PP_DirectPayment_itemized[1] = array();
$PP_DirectPayment_optional = array();
$PP_DirectPayment_optional[0] = array();
$PP_DirectPayment_optional[1] = array();
$cartIndex = 0;
$nextIndex = 0;
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Username";
$PP_DirectPayment_required[1][$nextIndex] = "REMOVED";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Password";
$PP_DirectPayment_required[1][$nextIndex] = "REMOVED";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Signature";
$PP_DirectPayment_required[1][$nextIndex] = "REMOVED";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "PaymentAction";
$PP_DirectPayment_required[1][$nextIndex] = "Sale";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Currency";
$PP_DirectPayment_required[1][$nextIndex] = "USD";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "IPAddress";
$PP_DirectPayment_required[1][$nextIndex] = "".$_SERVER["REMOTE_ADDR"] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CreditCardType";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["cc_type"]))?$_POST["cc_type"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CreditCardNumber";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["cc_number"]))?$_POST["cc_number"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "ExpMonth";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["exp_month"]))?$_POST["exp_month"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "ExpYear";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["exp_year"]))?$_POST["exp_year"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "FirstName";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["firstname"]))?$_POST["firstname"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "LastName";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["lastname"]))?$_POST["lastname"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Street1";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["street1"]))?$_POST["street1"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CityName";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["city"]))?$_POST["city"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "StateOrProvince";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["state_province"]))?$_POST["state_province"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "PostalCode";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["postcode"]))?$_POST["postcode"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Country";
$PP_DirectPayment_required[1][$nextIndex] = "".((isset($_POST["country"]))?$_POST["country"]:"") ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "UseSandbox";
$PP_DirectPayment_required[1][$nextIndex] = "true";
$PP_DirectPayment_itemized[0][0] = "OrderTotal";
$PP_DirectPayment_itemized[1][0] = "".$cehp->GrandTotal() ."";
$PP_DirectPayment_itemized[0][1] = "OrderDescription";
$PP_DirectPayment_itemized[1][1] = "";
while ( !$cehp->EOF() ) {
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Amount" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$cehp->DisplayInfo("Price") ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$cehp->DisplayInfo("Name") ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Number" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$cehp->DisplayInfo("ID") ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Quantity" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$cehp->DisplayInfo("Quantity") ."";
$cehp->MoveNext();
$cartIndex ++;
}
$cehp->MoveFirst();
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "MerchantSessionID";
$PP_DirectPayment_optional[1][$nextIndex] = "".session_id() ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Payer";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["email"]))?$_POST["email"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Street2";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["street2"]))?$_POST["street2"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Phone";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["phone"]))?$_POST["phone"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "CVV2";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["cvv"]))?$_POST["cvv"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "ItemTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$cehp->TotalColumn("TotalPrice") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "ShippingTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$cehp->GetShipping() ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "HandlingTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$cehp->GetCharges() - $cehp->GetDiscounts() ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "TaxTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$cehp->GetTax() ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Name";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_firstname"]))?$_POST["shipping_firstname"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Street1";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_street1"]))?$_POST["shipping_street1"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Street2";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_street2"]))?$_POST["shipping_street2"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_CityName";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_city"]))?$_POST["shipping_city"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_StateOrProvince";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_state_province"]))?$_POST["shipping_state_province"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_PostalCode";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_postcode"]))?$_POST["shipping_postcode"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Country";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_country"]))?$_POST["shipping_country"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Phone";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["shipping_phone"]))?$_POST["shipping_phone"]:"") ."";
$WAGatewayResponse = PP_DirectPayment_Post($PP_DirectPayment_required,$PP_DirectPayment_itemized,$PP_DirectPayment_optional);
if ($WAGatewayResponse) {
$cehp->redirStr = "";
}
else if ("" != "") {
header("Location: ". "");
exit();
}
}
?>