If you are using BootCamp I can not help you in detail because as it was in unsupported beta 2 years ago I chose not to use it
First clone your VM into two or three copies, I keep mine and run them from external firewire 800 La Cie disks
You may then safely experiment with altering the configuration of one of the copies
if you spoil one no harm done just make a clone of a clone
(It pays to use the Parellels >> Menu >> File >> Clone for this (also for deleting old VM)
my own VM is 32 GB with 20 GB free because I always save data in shared folders on the Mac OS side, and back up my databases and critical documants out of house onto the web
I hope you find a solution - bootcamp has a history on these forums of causing cries of pain :-(
Hugh W
Last edited: Mar 25, 2008