Wireless NIC support is poor in Knoppix (a fault of the manufacturers only releasing Windows code and not true open source code for the drivers). 802.11g support is worse. It sounds like you are asking without even trying. I would suggest seeing if by some stroke of luck Knoppix does recognize the wireless interface. But if that fails I would suggest going with a wired connection. While there are some tricks you might be able to use to get Knoppix working with an unsupported interface, I expect you'll find it simpler to install Debian and track down a proper Linux driver for that card (if one exists) than gett9ing it working with Knoppix.