Looking for a banner rotation system

[master1425]

Im looking for a banner rotation system.

But, I need a fairly complex one.

My site has 3 columns, left, middle, and right.

Now, lets say I have 15 ads that I want in the rotation system.

I have 8 spots available on the "right" column. and 2 available on the "left" column.

Is there a system out there that will rotate all 15 of my ads in the 10 spots I have available, even though their on different places throughout the page.

Some bonuses I'd love to have:
1.) Can preset a time that the banner will be removed from rotation.
2.) Can set a "priority" or increase the chance that a banner will be shown.

Any help finding, or making this script would be greatly appreciated.

[Medyman]

I like to use http://www.openx.org/ for this kind of stuff.