When I make a listing, it only allows me to post to Bimmerforums, even when I want to create a thread in R3vLimited. How do I change the forum that I wish to post to?
It looks like your account is not yet connected to r3vlimited yet. You can connect another account by following this simple guide: Creating a listing thread on a forum.
Once you've added your r3vlimited account, you'll have the option to choose which forum you wish to post to.
Hope that helps!