YES, it is worth it!!! IMHO xp works much better than Vista on the 02. I have found no drawbacks at all, only faster loading of the OS and programs, less lock-ups and the cpu just doesn't seem to have to work as hard (runs cooler/less jet turbine fan). Well at least that's my observations between the two.
I used Vista for over a year and then got a good deal on an xp unit. Night and day. The xp unit has the same exact programs and such and I had stripped down Vista to the bear essentials. XP is just better on the 02.
You can get all of the drivers at
www.oqoasis.com