Welcome to the forums and congratulations on the M20x purchase.
Installing programs over the network can be very straightforward. On the desktop or unit with the CD, make sure the device is shared and provide it with a good name so that you'll recognize the device. For example, I use the term "CD Drive" and include in the name the Machine and location. Insert your CD. Next, attach the Tablet PC to the network and the CD drive should show up in the My Network Place. You then click on the proper folder and start the install program.
I realize that isn't detailed but enough to get you going. If you need more information then we can do some screen captures for you.
Good luck !
Oh and don't forget to go to
Tablet PC Post for ink enabled applications!