Someone else here will probably be more help than I will be, so I'll make this short!

Here's the PT forum, might give you some answers:
http://www.pokertracker.com/forum/in...e88a4c3cd1855c

Here's the PAHud site:
http://pokeracesoftware.com/
Basically it displays stats on the table for each opponent. So for example, you might choose to see their PFR% while you play with them. If they've raised 25 out of 100 hands, it will display as 25%. These stats are taken from the PT data you collect as you import hands while you play and are updated as new hands are added.

You can DL the software for the HUD for free and use it at one table at a time to try it out. You have to pay $25 to register it, which gives you the ability to play multiple tables using the HUD.