Wireless conncecting a Mac desktop to a PC laptop

Help Plz - wifi from desktop Mac to laptop PC
I have a powermac G4 dual proc, using a cable modem. It has an open port for airport connection. I Just acquired, out of necessity, a Toshiba laptop which already has a Netgear wireless card installed. I bought a Netgear Rangemax Router, only to find out after contacting Netgear support, that the disk included does not work with Mac. Looked up on line and printed manual and proceeded to hook up router as instructed. It locks up my Mac upon start up. So I have discovered that there is no wireless card installed here. Looking at the Netgear card specs, I see none that are compatible with Mac OS.

I have OS10 but have not been able to get it installed - it freezes when it gets to the end and says installation was unsuccessful. So I am still running OS 9.3 since I have not had a day to sit and figure it all out.

My question is, what wireless card do I need to get to install in my Mac to make this all work?
Any an all advice is greatly appreciated.