This is VERY troublesome, as my computer is breaking down enough.
Anyway ZCL doesn't load Zquest in windowed mode for me. All it does is adjust the resolution, wait a few seconds and then goes back to normal. I can't run Zquest in full screen mode because of the large ammounts of lag it causes when exiting.
Erm... posted in the wrong thread.
EDIT2: Nevermind, I set something up wrong. I fixed it, oh well.