I faced this problem, too. Here's the solution:
NASCAR Racing (European) will try to load the car 'beng13' when entering
the garage. It is the car you can see in the background of the pit, #13 with
the 'Bengal' labels. This one does only exist in the European carset.
If NASCAR Racing can't find this car, it will say 'can't load garage'.
Just load the new carset file, i.e. 'iwcccars.dat', into an editor and
start a 'locate & replace' for one of the car strings, i.e. 'skid00'.
Replace it with 'beng13'. If you load the garage next time, you see
the new car in the background.
P.K.
--
___________________________________
| Philip Kollmannsberger |
| 91091 Grossenseebach / GERMANY |