to Add a forum to your 'My Forums':
1st go to the the forum you want to add (RC Jets in this example)
and click on 'Forum Tools' then 'Subscribe to this forum'
this will bring you to another page where you'd click on 'Add Subscription'
and that's it! click on My Forums again and Viola! RCJets is now in 'My Forums'
to remove one, repeat the process, but click on 'Forum tools, Unsubscribe from this forum.'