One is to download the WinXP driver and use ndiswrapper to install it. This isn't the route I chose, but to do it, just download the WinXP driver, and run:
If the driver and hardware show up after the last command, you're in business. Just edit /etc/modules and add ndiswrapper to that list of modules.
The second way to do it is simply to use a non-SMP kernel, like linux-image-386, which is what I did, because I only have one processor on that machine.