In addition to what has been said also note that a lot of linklist owners will not like seeing their recip below the gallery entrance link. And your sponsor banners probably will not do very well either unless it is made so that it is visible without the surfer having to scroll (because in general they won't if they already see the ENTER link).
Remember that all your banners do not have to all be on one page either. You can put some of those banners on the actual galleries too. One or two a page is generally safe, but check the rules for each freesite.
Good general design skills though. You just need to learn the ins and outs of freesites, that's all.
