Just saw this @ G256.com.

Still to this day Karna has not put out official drivers for the Razer Boomslang series of mouse for Windows XP, however the following dedicated fan site may help. Razer.tigga.org is a site dedicated to the Boomslang mouse and provides tips and tricks to get your mouse working with WindowsXP. There is also a very usefull and busy forum. I invite you to visit if you are an owner of the Razer mouse. The tips really work.

Razer.tigga.org