Ah, I'm sorry Nightcr4wler, I didn't realise that function wasn't available on XP. That kinda sucks then...sorry about that.
An extreme solution that I've been told about is to do with installing a 'virtual PC' on your computer - which is a way of running more than one operating system on your PC at a time. You install the software, create a virtual harddrive, and install MSDOS into this - so essentially, it's a separate DOS computer within your XP computer, which theoretically you can run any DOS game on.
If you're thinking this sounds complicated, you're right ;-) but according to my friend the computer expert, it's not that hard, as long as you have the disks to install MSDOS with - which I don't know if you do. I don't know if I do either, for that matter, I'm still hoping DOSbox will work for me before I try and do this...but if you're good with computers (which I'm not) it's an option worth researching at least. Google 'virtual PC', and see what you come up with.