Whenever I try to play worms 4 I get an odd screen that is just colored with no graphics at all, I'll use a picture cause it's hard to explain.
http://img508.imageshack.us/my.php?image=oddou6.png
My system meets all the requirements:
AMD something(forgot it's name) 1.6GHz
Nvidea Geforce FX5200
512M.B RAM
Windows XP
Direct X 9.0c

Hmm, have you got the latest graphics drivers?

Yes (and the latest driver for my card came out in December 2007). What is strange is the codemasters screen loads fine, the Team17 thing loads fine, even the bit that says worms 4 mayhem loads perfectly well. But my loading screens do kind of look odd too, it looks like the other picture except just squares in the middle-top area:
http://img293.imageshack.us/my.php?image=odd2vg4.png
Any help would be greatly appreciated.

oooooookayyyy, do you have the newest version of directX? (dunno IF this could help, but its just a suggestion)

Well this is going to sound like a strange way to fix it. To fix it I had to put the graphic driver settings on performance or quality, if I put it on high performance or high quality, the results are the glitchy screen. Odd fix, but i'm happy about it