I picked up a WRT54G V3 the other day at a garage sale. When I got it home and fired up it worked just fine but when I tried to access the interface, it would not let me in and it kept saying that the router says "tomato". I did a hard reset and it still said tomato, but it did let me in with the admin access code. Once in I realized that the software in the router was not DD-wrt but rather something called Tomato! I did a search on the Internet and found out what it was and how it worked. I tried a direct conversion from tomato to the first BBHN iteration for MESH. This did not work and, fortunately, did not brick the router. The router just would not accept it and did a reboot back to tomato. After reading some more, I decided to try and bring the firmware back to the original Linksys software. This worked! I went through a complete process and restarted the router and all was fine. I then did the upgrade to the first level of MESH, followed all the steps, including the new password etc. Turned it off and on and it booted up just fine. I then did the final upgrade to BBHN Ver 1. All went well. I now have another MESH router.

I included this in the forum in case anyone comes across a WRT54G router that has Tomato running on it. 

Happy MESHING 

Lance VA3LP