wordpress oscommerce plugin

i loaded an oscommerce plugin... as we need to setup a store...but when i activated it, i totally messed up my front page of the site... obviously the plugin itself is going to require some custom coding... i wasn't sure if this was in your sphere of work?? if yes, can you quote me how much it would cost to get this plugin working correctly?? the plugin is up there in the website, but it is deactatived... please let me know if this is something you think you can handle and if yes, how much?? the website is: <[login to view URL]>