If you were an existing user, you should have been asked to associate your new Groupee account with your existing message board profile. If you did that, great!
Now, the main drop down menu buttons at the top are 'Go' (to view your profile, members directory and all the forums), 'New' (to create new postings, polls, private messages), 'Find' (to search the entire forum), 'Notify' (to alert you via email to any new postings) and 'Tools' (to add to favourites, view printer friendly, email a friend and look up the HELP manual - choose UBB.x as the topic to learn how to use this UBB.x message board).
Any questions, tips, guidance notes you wish to put forward... please use this forum!
All the best, Krishan