I better add that I managed to get sound now by re copying the files from the cd, but the sounds and game stop after about 5 seconds...

I think I may have the same issue. Scummvm works fine on windows but when running on symbian (N97) I have issues. Basically I have no sound when selecting mega monkey, the intro works fine, then there is no music when loading part 1 and when guybrush says his first line the game freezes. However if ...