I bought a USB WiFi key, the Hercules HWGUm-54. Apparently, the appropriate driver is the RTL8192SU from Realtek. I downloaded it from their website and extracted it.
I then went to the
driver folder, extracted the archive and went into it.
As root I did:
Make cp 8712u.ko /lib/modules/<my_kernel>/kernel/drivers/net/ depmod -a
However I got an error:
WARNING: Can't read module /lib/modules/220.127.116.11-35.fc15.x86_64/kernel/drivers/net/wireless/8712u.ko: Exec format error
Any ideas why?