Customize php website template

I have a php template from Guruscript that I would like adjusted. The site is a crowfunding platform that allows donations to many user uploaded projects. People can then donate to those projects. When people donate they are forwarded to PayPal for their donation. PayPal then returns verification of the payment and the donated amount is added to a donation total in myslq, which is shown on our website. I want the template adjusted to NOT redirect to paypal, but instead to post the donation and accumulate it in myslq. I would like the donation to be a pledge with no money exchanged, just posted and viewable on our site. I believe the [login to view URL] file needs to be changed/altered.