Do you have the install media for XP and Win7? If so, have you considered backing up your windows installations, blowing out the entire system, installing pclos, and the running the Win systems in virtualbox?
I have to use windows to run the accounting application we use at work. However, I prefer the virtualbox solution instead of dual booting so that I can run windows but still have my pclos system available for doing all other activity (email, internet, music, spreadsheets, word processing, etc.)
Virutalbox also gives you the ability to establish a location to be shared between host and guest systems. If your netbooks have sufficient resources, this may be something to consider.