E-commerce Plugin and Wordpress Website Customization

We are working on a pre-existing WordPress that is upgrading their current e-commerce module to MarketPress + Affiliates by WPMU Dev. Installation has already been done but now it needs customization to include a mapping function where customers must choose a distributor near them. Also, the distributors are to be set up as affiliates in addition to some other tasks. The old e-commerce module will also need to be removed. Even though this is a WordPress site I understand that the entire thing is hard coded. I need completion of this job within 24 hours.