Carl,
One very important thing to consider with the delete command you are advising; make sure there are no other games installed into that area. ie, if they have MTW and MTW2 both installed into the same SEGA directory, deleting the SEGA directory will mess up the MTW install.

I've had to write too many step by step instructions to not look for ANY WAY someone can mess it up. I'd rather not have someone come and complain to you because they just killed of their entire TW collection including their favorite save games.