1. Download [
http://www.bitsum.com/files/vxworks_revert_v02.zip] and extract.
2. Download the latest Linksys firmware for your router from
http://www.linksys.com.
3. In the DD-WRT Administration/Firmware? Upgrade tab, select and apply the openwrt-wrt54g_v4-squashfs.bin firmware you extracted in step 1.
4. DO NOT TOUCH YOUR ROUTER. DO NOT POWER DOWN YOUR ROUTER. IF YOU DO, YOU MAY/WILL BRICK YOUR ROUTER.
5. After a few minutes (have patience) your router will reboot itself and the VxWorks boot loader's Management Mode will be engaged. You can visit it at
http://192.168.1.1. If the browser doesn't respond, WAIT LONGER. Do not power off your router.
6. In the Management Mode, select and apply the Linksys firmware you downloaded in step 2. DO NOT apply vxworks killer instead, even if you want to go back to linux again right away. You must first apply a Linksys firmware to re-initialize the flash before you can go back to linux.
7. Power cycle the router after you see 'Success'.