Some php code modifications in a paypal donation script

I have bought a donation system from codecanyon which I had setuped and is working fine, would like a small modification in this system Work is around 2-4 hours max, need skillset in php, mysql/phpmyadmin and some know-how of paypal API I am a php developer and coder myself so will be assisting you, due to lack of time I am not able to work on it myself so need someone to fill in Work is hour based, though you can also let me know your fixed price for the work No need to include your portfolio, I will judge potential freelancers myself in chat Any proposals with full fledged long messages or portfolios will be ignore, I will consider them auto-bids or spam