Define zones in Openx

I have installed Openx on two websites to manage the ads. But the zones in Openx has not been defined so good, so when I add a banner I can not chose where on the website it is shown. There is one banner on top, one in the middle and one banner at the bottom of the website. But when I try to add a banner on top of the page it it just showed on random and not on top. This is what I need: - To define six bannerspaces in Openx on two different websites so I easially can place banners on these defined spaces. - Remove two bannerspaces from one of the websites. I would prefer if you have experience with Openx. The websites in question is a forum in Vbulletin and a forum in Phpbb. I know Vbulletin can be complex, so if you have experience with that aswell I would feel safer. I have more work if you are skilled and have good communication skills. You must speak good english.