I have the wavelan silver and it never shows up as an airport card in OS9 or OSX. For OS9 I used the official drivers I found on the internet and they work find. For OSX I used:

http://wirelessdriver.sourceforge.net/

Beta 5 works with 10.2.8

http://sourceforge.net/projects/wirelessdriver/

Beta 6 works with 10.4.x

When installed it just comes up in the system preferences under 'Other'.

For beta 6 you have to open it each time you restart or after waking the machine to make the card active. I cannot remember if this is true for Beta 5.