customize our script php/mysql

This is a Customization project for a php/mysql Guru. We have a script, but the script has another domain name inside it, we need to put our domain name in it instead (everywhere there is an instance of the other domain, ours should be there). basically we want a creative developer that does not work in a linear [login to view URL] script has to work perfectly after you've done the customization. also, need to customize the login screen. if all works out and we like what you have done, then we will let you add affiliate feeds into our script. This is a PHP/Mysql. we need someone who does this for a living, very smart and fast. the script is not small, but the job should be pretty simple and easy.