OpenX Mods needed

I currently have about 46 advertisers and need to rotate their banners from one location to another on the home page. On other pages, only some of the ads need to be shown, but also rotated. I would need to be able to add or take off advertisers as well. Each banner is only 15-20k, but when I tried to create zones, it took too long for the home page to load - so the time problem would need to be solved. If you are an expert with OpenX and can do these mods, then bid on this project. It would start with the upgrade to the newest version of OpenX. The advertisers and banners are already in a database.