Restricting USB

There is a version of linux (I only know it as damn small linux....that's what it's called, no joke) and my friend and I have discovered that it can be run off of memory (something like a live linux disk). We also found that it was small enough to put on a flash drive. My question is: Is there any way to restrict who uses the USB ports in WinXp Pro? I know how to restrict CD-ROM access to only the user that is logged on, but I haven't heard anything about USB. Hypothetically speaking, the linux could be a bit of a risk if the user knows how to mount the hard drive with linux. I don't know if this would happen that often, but it's still something to keep in mind. Thanks :)

By the way, this post seems to be similar to mine, so I'll try to keep an eye on it as well...

u3 USB security risks

http://support.microsoft.com/default...b;en-us;823732

OR something like this: http://www.securewave.com/sanctuary_...y_software.jsp