Found the solution!!! (For me anyway..)
It was EAX! .. Unbelievable, I know.. I had to turn it ON!!!!! and the problems gone... I noticed that the problems got worst not because of the amount of players on screen, but because of the amount of simultanious sounds (and more players USUALY make a lot of noise)!! Then I remembered something about an EAX bug.. I tried it and it fixed it..
Norton Utilities can also cause the problem I read somewhere (the speeddisk util), but it wasn't in my case..
I hope this helps for some others too..
GG & GrtZ...
I'm only talking about freezes in counterstrike here, I had no problems with freezes elsewhere..
... how dare they calling me a virgin techie.. hehe