You can also do the same thing more simply, more reliably, and more responsively by using a USB extender and video extension from a supplier like Gefen or Network Technologies. I've been doing this for years (and used an ADB extender before USB). I've got a keyboard and a nice flat screen monitor on a small roll-around desk. Everything is cable tied, and the monitor and keyboard are held down with sturdy velcro. The cables (including the line-out cables going to a mic pre-amp on the same cart, are neatly tied into an umbilical cord, and the umbilical cord is long enough to position the cart anywhere I'd need it in the studio. It's 100% reliable, and won't run low on power like a portable computer on batteries. It also has no fans, hard drives or CD/DVD drives to make any noise that could leak into studio mics, and it doesn't go to sleep to conserve power.
Lee Blaske