Just saw this and I'll try my best to answer, cause maybe I'll help? PM (Private Messaging or Post messaging, I get them mixed them up), in-game, is done by mailbox. Click on write and type in your character's name at the top of the letter.
Forum Profiles? I don't know exactly what's that, but you can check people's profile by looking up the character of him/her.
To do this, you do the same way with searching up the forums, except clicking on Lookup Character.
Hope it helps.