Process underway and may take awhile ...
Here is the How To link.
Proper hard reset is necessary <link>.
Woops, this one is on the don't bother to flash serial number list but v6 can use mini firmware. I must find my older model.
ASUS WL-500g Premium V2 (This may be the way to go 15 bucks more than Linksys)
Wiki for install
Alternate possibility Gargoyle firmware