If everyone already knows this, then I apologize, registration opens 40 minutes before tourney starts. And like I said earlier, it fills up in less than a minute.
Click on "status" a couple of times till you get the tourney section set up right so the FT point tourneys are on top. Right below that the freerolls that are open or "registering" should be there. And scroll a little down and you should see the "announced" tourneys. Find the next anounced freeroll (for your area i.e; united states, or any country) and pull up the lobby for it. And notice the time its registration opens. Be ready to register around the time it opens.
I know this seems like alot to do for a simple freeroll. But if you want to play on FT, its the best way I can think of. Its also mainly why I play at Ub. Their freerolls go on like every hour just about. Plus their min. is 5000 players, so Ive never NOT been able to register for one. Except for if Im too late.