Instructions
Open up the back compartment of the second Wii controller that you want to add and make sure you have inserted two AA batteries.
Press the "Power" button on the Nintendo Wii system with the "Tiger Woods PGA Tour 08" inserted.
Open up the SD card slot below the "Power" button. Press the red "Sync" button below the batteries on your Wii remote.
Press the "Sync" button below the SD card slot, after which the LED light on your controller should continuously blink. The second controller will then be added once the blinking stops.
Use your first Wii remote to select the "Tiger Woods PGA Tour 08" game from the main menu, and you can now play with two players.