I want a plain solid colored background on CM4. I know there is some stuff in CM4 to 'design' your own skins... anyone know of links on where to do this, or where to download others?

There are some CM skins to download at CMskins.com. Best download is the club badges for each league which, if you can get them working, make the game look nice and pretty.

If you pop along to the sigames.com forums then there's a skinning forum where people discuss how to skin the game etc.