Ok there is two things you can do if you want to use windows xp pro regular or media center edition on your tablet.
Here is what you need
1. windows xp installed
2. the windows xp driver for the pen must be in a executable format.
3. winrar (availible from our good freinds at cnet
Free Software Downloads and Software Reviews - Download.com)
install winrar.
after install has completed.
right click the installer package for the pin driver and select extract files.
now once this is done just go in manually and install the driver.