After some extensive googling, I have essentially discovered that gpedit.msc is NOT accessible in XP home, which would be fine EXCEPT I am running XP Pro. I have been unable to find any means of restoring the service, and it has remained inaccessible, despite trying to restore what files I could find from my xp disc to /system32.
I would really prefer to not have to reinstall windows, but I also need to be able to access this service, so any help would be tremedously appreciated since it has been a very frustrating ordeal to try and resolve.