Are you using the EXTRA fields in user profiles? If not, you could use one of those fields to store the CAR information, then you would just call that U_Extra? in your showflat and showthreaded php files. After adding it there, edit your showflat and showthreaded templates, place it below the LOC reference, and there you go!
Any time. When you get into showflat.php, you will pretty quickly see the QUERY that is pulling all the information. Just make sure you add the proper U_Extra in the query, and then assign it a variable name (ie - $UExtra2 or whatever).
Then you can assign and pass that to your template, and pretty much place it anywhere on your template you want.
Showthreaded will be very much the same, the only big difference being that the template in places.
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