Poker Tracker has it's own forums with very specific "Frequently Asked Questions" sections.

Also Poker Tracker itself has a help section about how to set it up.

The Poker Tracker application looks very daunting at first, due to the sheer volume of information it presents to you.

But that aside, you just install it like any other programme. Then just go into the set-up section and tell it where to find the hand histories from the site you play on.

The hand histories are text files that are sent to your PC the second a hand is finished. Poker tracker will read these files and add their information to a database of statistics.

Poker ACE HUD (Heads Up Display) will "talk" to Poker Tracker and Superimpose the key statistics on top of the table image, next to each player as appropriate. Saves you flicking back and forth to the Poker Tracker programme while you are playing.

Hope this helps,
Regards,
Ian