i don't know what to say mate .. but just try Winrescue .. it can backups, or repair registry.
www.superwin.com/frescuex.htm or chek it win register viewer
www.freedownloadscenter.com/.../ Registry_Viewer_for_Win9x_ME_NT_2K_XP.html or
Windows xp services registry files on www.blackviper.com/WinXP/registry.htm .

just try it mate.