You can try the hints here:

http://people.wallawalla.edu/~Rob.Frohne/Cardbus/Cardbus.html

Note the link for the USB adapter card software is broken, but you can find that here:

http://www.alksoft.com/personal/stuff.html

The "Kanga" is just a 3400 with a PPC 740 soldered to the board instead of a 603e; Note the fine print about the physical slot not being cardbus compliant even though the controller is applies to them as well, so even *if* you have a working set of drivers there are edge cases in which the card may fail to work anyway.