Paypal Donation module is very small module, it contains simple paypal code form for user/visitors to make donations to your website, the module is easy to install by simply use include tag, no script modifications required..
1. Upload file to your server at location /engine/modules/paypaldonate/
2. Open file: engine/modules/paypaldonate/paypaldonate.php and edit the settings for your paypal account details
3.Add This Code Where You Want To See The Donate Button