It goes into the game fine, but when I actually go into a match, the worms look rather strangely coloured, and the terrain isn't shown, in fact, everything else is just black except for the strangely coloured clouds and worms; I've searched for past players who've had this problem, but all of them seemed to have some "Kazaak" thing installed or the Nimo codec pack installed, but I don't think I have either installed (not entirely sure about the Nimo codec pack though, but when I searched my audio/video codecs in the control panel, it didn't mention anything about the Nimo codec pack), is anyone familiar with how to solve this problem?

yeah i had the same problem because i use Vista but i just used this:
http://forum.team17.co.uk/showthread.php?t=38883
and now i don't have that problem anymore :)

I used that color fix thing, and it worked (selected method 2), however, I'm not using Vista or Windows 7. ='D