If so, and you're not already aware of it, I found a program that will run them under XP. It's called DOSBox and can be had
Here. It supports over 1000 old dos classics. I've been loading up all my old favorites like XCOM, XANTH, and it even loaded up Ultima VII. Be sure to get the front end for it (D-Fend), it really makes tweaking all the settings easy. Go blow the dust off those oldies and start playin'!