$5 is like paying peanuts! It's too less. Who says it is easy? But what makes things easier for you is the fact that this thing has already been made by a leading module developer BrokenCrust www.brokencrust.eu .
If you want to put in only the admin feature then do a forum search as there is a hack around here somewhere.
Besides for Forums Pro related issues it is better to contact people @ MyndWorx and not here.
Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Linux/2.0.54 (Unix)/5.0.51/5.2.6/DragonflyCMS 9.2.1