Thx guys, I tried your suggestions:
- I didn't burn the iso's, because I have the original CD's. But I'd like to play the game wherever I want without hauling all the CD's, that's why I'm trying to use images.
- I tried to mount the 4 CD's in 4 different virtual drives. That seemed to go OK. I loaded the game, and died in the first mission. The game asks for KS CD 4 (for the burial sequence), and to my joy it ran the sequence allright. However my joy was shortlived, because after this sequence I got an error when returning to the game, saying that there was no CD in the drive (although all 4 iso's where still in the same virtual drives).
- CTRL+ESC gave the same problems as ALT+TAB: I couldn't access any other window.
- I tried to switch CD's with the inbuilt hotkey function of Daemon Tools Lite, but after I use it, it opens a window where you can choose which iso to load next. Due to the original problem I couldn't access this window. Are there any third party programs that let you circulate through 4 images in Daemon tools like the CTRL+F4 function in DOSBox? I couldn't find them.
I tried to run KS-WC3 without the ddhack and there was no problem with ALT-Tabbing to other windows (although the colours were totally corrupted). So the problem must be due to something within ddhack.