I think with paypal standard, the shipping address will only be included in the reciept email if it is different from the billing address, paypal doesn't offer a way to customize the emails reciepts.
maybe if the no_shipping option is set to 2 (prompt for an address, and require one) it will force the email to include the shipping address:
<input type="hidden" name="no_shipping" id="no_shipping" value="2" />