Use this forum to post up all about your car. I suggest 1 thread per car. Use the first post in your thread to put up the pics and information. When this information changes use the Edit button to update the first post. All subsequent posts can be used for people asking questions, praising or slagging your car.
I'll look into a way of linking signatures or avatars to the first post here too so people can find out about your car from clicking on your sig.
I was looking for a way to link it up to the Cars field in the profile too though. If you go to your profile you will find there is now a field to enter info about your car. You can see mine next to my name in this post. I wanted each car to link to the users post. Problem is that field won't recognise any tags or html to make the text into a link. There's probably a way to do it though. Something to look at after I finish working through the bugs and issues thread.
Yeah there's probably a way around it, but I'm sure you know about 100 times more about this kind of thing than me so doubt I can really add anything constructive! Only thing I can think of if someone's already made a plugin/script/whatever for the same kind of thing.
"Hard work often pays off after time, but laziness always pays off now."
your car. 
