On the Auto Import tab in PokerTracker 3, select PartyGaming from the site list on the left hand side, then click the PartyGaming Configuration tab to the right.
Tip: If you do not see PartyGaming listed, check the Show Hidden Sites option.
If you do not see your hand history folder listed, click the Auto Detect button. This should add the correct folder to the Directories Configuration. If it doesn't, you can manually select the folder using the Addbutton. If you play on more than one PartyGaming site, make sure that all of your sites' hand history folders are listed here.
If you wish PokerTracker 3 to start importing hands from PartyGaming whenever you start auto importing, enable the Automatically Start With Auto-Import option.
If you use the Preferred Seating option in your Party Poker software (so that you are always shown in the same seat at every table) then you need to configure PokerTracker 3 to the same seat using the Preferred Seating section of the PartyGaming Configuration tab.
Seat numbers start with 1 in the one o'clock position on the table and work clockwise.