Distinguished SJ racers

,
I recently upgraded my computer and had the silly idea that I could just archive my existing GTL directory, and copy it all back after I got the new setup running.
Well, that didnt seem to work, GTL wants to to do a reinstall (I assume this because it is asking me for my CD key).
I would like to keep all my mods/patches/tracks/SJ car pack and not have to start from ground zero.
Any ideas on a procedure to follow?
Gary..linklemming