only thing is that i have Windows XP 64 BIT. and even though it works i can download the software as it reads my operating system as windows server 2003 (I think). This meant i could not use any of the short cuts on the pad and it wasnt presure sensetive which i need for Z Brush. anyone using windows XP 64 Bit with and optical pen mouse?? can you give any recomendations..