ive played and completed this game years ago, i just got it agen recently, but i cant remember how to find that garage where u store the 50 cars i think? Its in portland, and i get the pager thing in top left of screen about delivering them, but doesn't tel u where the garage is to deliver them. Can any1 help me please? Thanks

there isn't a garage where you can store 50 cars at least not in this game but I think you might be referring to the import/export garage.
That one is in portland harbour.

on the docks