Alright, first off - if you want to post some pictures of your car - well, go right ahead!

Now, you do this by going into the board for your type of car, and posting a new topic in it.* This topic is now your "gallery".

If you go to the topic you posted, the URL to it should have a number - it will look like:
http://www.performance-shop.com/yabbse/index.php?topic=NUM.0

Copy that number.* It's your Gallery ID number.

Now go here:
http://www.performance-shop.com/yabb...ofile;sa=theme

And type that number into the "Gallery topic link" box.* After this, you will have a little icon next to your posts that looks like this

You can have multiple galleries, simply place a comma between the ID numbers.

Enjoy.

-[Unknown]