on the confirm page, there will be a code block to send the item name paypal, it will look like this:
$nextIndex = count($WA_PP_ECO_Do_itemized[0]);
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$cartName->DisplayInfo("Name") ."";
you can edit that to concatenate other columns:
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$cartName->DisplayInfo("Name") ." ".$cartName->DisplayInfo("Description")."" ;
you can add additional columns in the sam manner
note: the name has a character limit of 127 characters.