Linksys Wireless Receiver?

Let me start off by saying that I've never used a Mac before today, so if you explain a solution to me... use simple terms, lol.
As you may have gathered, I've always been a Pc guy before today (basically just because I could never afford a Mac) I came about an iMac today. Its used, but it was only $100. It's an iMac G3 (I think) It's One of the colored ones... it's a slot-loading indigo one. The model number is M55211 if that helps.
Okay, the point of this post...
I have a Linksys Wireless-g Router (model # WRT54g) and I have a pc with Windows Xp on it in my bedroom connected to the router with a Linksys Wireless Receiver (model # WUSB54g). They have always worked great together, blah, blah. When I got my iMac home today I fired it up and it starts in Mac OS X 10.1.3, but it also has Mac OS 9.2 on it also. I plugged my receiver into the USB port and the power light lit up, but the link light wasn't flashing like usual. I figured that it was just a missing driver so I put the install Cd in. Since I had never used a mac before I tried to open the setup.exe... and as you can guess, that didn't get me too far. I searched the internet for a long time to find the driver so I can use my iMac along side my Pc in my bedroom. Is there anyway that I can possibly use my linksys receiver with my iMac? and how?

TIA!

I've been searching around and Ralink Tech keeps popping up i guess they make the chipset for the device, might be worth checking out these usb drivers.

Thanks for the reply!

I really have no clue which one of those drivers that I should try, any suggestions?

I have no idea to be honest i'm not even certain they will work. Other people on the net seem to be saying use the drivers on that link.