Renaming or removing network interfaces

Hi,

I need to remove the en1 interface that Tiger assigned to a wireless pc card. So far I've done the following, but the OS refuses to remove the interface:

a) removed/uninstalled the IOXperts driver that the card uses; rebooted, no joy;
b) edited /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist; rebooted, en1 still there;
c) saved a backup file, then trashed the file above; rebooted, still no go.
d) tried "sudo ifconfig en2 remove"; that didn't work as well.

ifconfig(8) informs me correctly that the interface is already gone; it's the GUI that stubbornly still lists it as a network option. I never realized this wasn't trivial like it is in the BSDs.

Any pointers appreciated.

Thanks in advance.