Malware reboot loop

Hey i'm pretty sure I have the vundo virus and positive its malware as error started after someone did a dodgy download. Computer was booting to empty desktop where only control was through task manager after two identical error messages of userinit.exe failed to initialise (0xc0000005). Ran a repair from the xp install cd and now am stuck in a reboot loop where it goes to bsod and then says setup is restarting. Unable to boot in any mode including safe or last good config they all loop. Was considerig making a boot floppy but dont know if itll work. Im ok with reinstall or reformat but just want to boot first so i can retrieve some data. Is this fixable with a boot disk or through recovery console or some other method?