How can I get "SMC2662W-AR EZ Connect Wireless USB Adapter" to work under linux?

I'm running Fedora Core and for some reason it does not give me the kernel source (can't install it even by hand) so I can't compile any kernel drivers.

I tried installing the at76c503a driver and I got it to work inside our LAN but not to the internet and then it suddenly just failed to even find the adapter.

So what do you recommend to do to get the thing work under Fedora?

smc-europe.com/english/support/driver_manual/wirel/download/2662W-AR/2662W_AR.PDF

very similar to:
smc.com/index.cfm?sec=Products&pg=Product-Details&prod=254&site=c

I am having the same problems you are. I am having a hell of a time getting that card to work in FEDORA. SMC made the Linux drivers but should have gone the extra mile and them distro specific.