Basicly you partition your drive into at least two "virtual" drives. They can show up on your XP system as drives C and D.
You then would load win98 on the second partition.
When you turn the system on, it asks which partition to boot to, which is the only real draw back. you have to reboot to get to the other OS.
I have a quad boot system I use for support. I have Win98/ME/2K loaded on the first three, and the fourth I ended up mounting under the win2k because I needed more room and didn't want to spread my programs around. Use a different system for XP support. This lets me boot to which ever OS I need to walk people through over the phone.
Do a google search, as there are many detailed guides that will show you step by step how to do this. There are also products like partition magic that can handle this for you. Many options and many here could give you a better guide of how to, instead of What to.
Post in the QA on creating a dual boot in the windows category and you will get all the info you need or just do the google search.
Let us know if you get it going. Good luck!
