[thejeff]

I have definitely transferred games between PCs. I picked up hosting of a game when the original host had to drop out. It worked fine.

There should be no issues. Nothing should require copying the actual executable and other files in the install directory. Obviously any mods & maps should be copied and the versions should be the same.

Permissions issue maybe? Make sure all files in the game directory are both readable and writable by the user running Dom3.

I can't really think of anything else. You could send them to someone else to see if they have the same issue.