osCommerce SEO contribution

I need additional osCommerce contributions for this one: [login to view URL],2183/category,3/search,SE+URLs NIMMIT SEF is already installed but I still have the "?" and the string of numbers at the end of the URL that I want to get rid of. example: www.mysite.com/category/Lighters_Zippo+[login to view URL] The final modification should look like this: www.mysite.com/category/Lighters_Zippo+[login to view URL] Prefer someone that has experience in this area. I have followed all instructions for this contribution and the "search- engine safe urls" is turned off as specified in the contribution.