Paypal Standard can be setup in three steps:
Step 1. Open and verify your PayPal.com account, set up website payment preferences on the paypal.com website and copy the “Payment Data Transfer” (PDT) Identity.
Step 2. Fill in the BlueCart EXTENSIONS -> PAYMENTS – >PayPal Standard form, paste (CTRL-V) the PDT Identity.
Step 3. Register several test accounts in your BlueCart store, and make several test transactions from different locations to be sure everything is set up properly.