All you need to do to play in a Freeroll is:
Set up an account:
1. If you haven’t done so already, download Full Tilt Poker and install the software on your computer.
2. Create an account.
Now that you’re ready to play:
3. Once you’re in the game lobby, click on the “Lobby” tab, “Choose Lobby View” and “Standard View”.
4. Set the filters in the browser area to Tournaments, then select All, All, All Types and
freerolls/FTPs.
5. Scroll down the game list to find the Freeroll of your choice.
6. Click “Register Now”. Registration opens one hour in advance for daily Freerolls and 24 hours before Country Specific Freerolls.
The Daily Freerolls are open to all. The Country Specific Freerolls are limited to residents of specific countries or regions.