create a new profile.. then copy "garage.gar" to your old profiles folder..
(i think it also required renaming and copying "username.gal" file but im not sure what it even does..)
I remember doing this few times in the past. (backup first of course, so that if something goes wrong you cant blame me)

I have a bad issue with GTL also.. Starforce caused my windows7 not to boot and it had to repair itself.. so cant kick in my GTL serial.. = no online..
fecking bollox!