I don't believe the recovery enviornment allows for this. If you can get into safe mode on the computer you want to fix you should try safe mode with networking. If thats not an option you should build a BartPE/UBCD4Win disc if you want to access your network to copy over files. If you don't got an XP disc to build from you can download MSes Windows Automated Installation Kit (WAIK) as an .iso, burn it to disc, install it, and than use it as the Windows source for creating a really stripped down version of Vista on disc using VistaPE.
