Customize and change crowdfunding site guruscript

Customize and change crowdfunding site guruscript. I need to optimize graphically, but also functionally my site that uses Guru Script. The graphics must be improved. You have to make changes to the php code, inserting small functions and perfecting the method of payment. The site will be similar to [login to view URL] My site to change: [login to view URL] We consider the cheapest deals and better.