Revert dd-wrt to other firmware on Netgear WNDR4000

I have been trying to convert my WNDR4000 router from dd-wrt to openwrt. I have been struggling with how to get this to work. I couldn't get the Netgear tftp instructions to function correctly (didn't seem to find the router). I finally stumbled on the following, which I used to get me to openwrt.

From: dd-wrt.com

Read: TFTP
http://www.dd-wrt.com/wiki/index.php/TFTP_flash
and look at the WNDR3300 wiki:
http://www.dd-wrt.com/wiki/index.php/Netgear_WNDR3300#Reverting_.2F_recovery_tftp_mode

The basic process is this:
1.) Download the latest Netgear Firmware ver.1.0.0.82 to your home folder
http://www.downloads.netgear.com/files/WNDR4000-V1.0.0.82_8.0.71.chk

2.) Set static IP on wired PC (ip:192.168.1.10 mask:255.255.255.0 gw:192.168.1.1)

3.) Do a 30/30/30 and set the password on http interface when finished

4.)
$ telnet -l root 192.168.1.1
# erase linux
# reboot

5.) On a linux desktop using atftp
$ atftp --option "mode octet" --option "timeout 180" --verbose --trace --put --local-file ~/WNDR4000-V1.0.0.82_8.0.71.chk 192.168.1.1

6.) Wait 5-10 min & the router is ok
Reboot router, Clear browser cache and return Static IP on computer to DHCP.

7.)
$ telnet -l root 192.168.1.1
#passwd


Step 7. enables the ssh daemon and allows package installation.