IOGear Cardbus Card GPU202 Serial Adapter "powerbook g4 drivers mac" Questions

Powerbook G4 (1.67 Ghz) drive, I have no idea what I am supposed to click into to load the drivers? - Any help greatly appreciated. I am using Mac OS x Version 10.4.11 - Its a Powerbook G4 with 2 dead

...powerbook g4 15" 1.0 Ghz running tiger 10.4.11. It has very slow usb 1.0 and I purchased the IO Gear GPU 202 cardbus so I could run USB 2.0. When I went to download the iogear drivers from their ...