I have two versions I use. One is just a folder with RC.exe and some models in it, and the other is on a bootable CD with a batch file that launches RC.exe. I use the bootable CD (or floppy) on my XP machine, and I use my folder on my Pentium 90 laptop. At one point I setup sound card and mouse drivers on the bootable CD/floppy, but that was more of a pain in the butt then it was worth. I just set every model to use the PC speaker now.