Here's what the sign up screen looks like at Full Tilt Poker.
Full Tilt Poker Sign up
First of all you need to come up with a screen name. Make sure you pick one you will be happy with as you will be stuck with it. Next choose a password. Make sure to use a alphanumeric password. You don't want anyone getting into your account do you? Next enter a valid e-mail address. You will be sent a verification e-mail that you need to active your account. The next section asks for a bonus code, make sure to use code fpr100 (no spaces). This will guarantee you the 100% bonus.
The last thing you can do is choose an avatar. Anything from the mobster shown in the picture to frogs. Each FullTilt avatar can do different emotions. Which is a great way to rub in the huge pot you just brought down!