I had trouble installing the driver for the Linksys WPC54G notebook adaptor ('ErrorCode=-3 Incorrect data or not enough disk space' - even though there was a lot of disk space).
I think the problem was because I was installing on my company's notebook - and they put restrictions on what can be installed.
Are there other routers with less probelms installing (D-link for example?). Would I have better luck with a USB adaptor?