Rebuilding the Layout

One of my duties at my job is to keep our sites running at peek efficiency. One of them is http://advertisementworld.com/ which from a coders stand poitn is a ugly beast littered with a million so od add and no real way to track them.

Anyway my thoughts are to take the advertisements and story their html code in a SQL database something like

Add ID
Company name
HTML Code
Type (Affiliate ie linkshare, payed advertiser, free demo space, etc)
Listing Catagory

but im not sure how i would go about seting up a the sub sections of each catagory to display all relevent ads is a apealing format....

ie one 60x120 baner looks best on the side, 4 would look best under the normal add side by side.

so thats why i come here to get suggestion on how to design the pay out code?

fyi heres the banner sizes

• 120 x 600 (Width x Height) Tower
• 125 x 125 Box
• 468 x 60 Banner
• 650 x 225 Banner
• Blurb (ie about a paragraph of text and a image boxed)
• Full Page
• Text Link