This guide is for flashing Legend Pre 4.5 firmware to the Fonera. 

A translated Italian guide is available here thanks to JJtRvXX and thejoke:
http://www.wifi-ita.com/forum/viewtopic.php?t=2157&postdays=0&postorder=asc&start=0

Visit the forums to discuss this guide.

Prep 

The Legend firmware can be downloaded here.

Download "openwrt-atheros-2.6-vmlinux.lzma" and "openwrt-atheros-2.6-root.jffs2-64k" and save them to a folder like C:\tftp

You will also need a tftp program to host the flash images for the Fonera.  I recommend using tftpd32 which can be downloaded here (free).

Once you have tftpd32 installed, make sure the "Current Directory" points to the folder you saved the flash files in the step above.  Use the "Settings" button to change the"Current Directory".

Also take note of the "Server interface" IP address as well.  Make sure that it corresponds to the correct network interface and that it is in the 192.168.1.xxx range.

 Redboot will only look in the root folder of the tftp directory, so put the files in the root directory.  E.g.  put the files in C:\tftp not C:\tftp\flashfiles

 Installation

1.

Access Redboot.

Specify the local IP and tftp server IP address.  Use the following command:

ip_addr -l 192.168.1.254/24 -h [remote server address]  

Use the IP address of the tftp server you setup earlier.  For example, the tftp server IP address in this instance is "192.168.1.122".  Therefore, the command would be

ip_addr -l 192.168.1.254/24 -h 192.168.1.122

Ignore the "/home/alfa..." messages if you get them.  They are harmless and the flash will work nonetheless.

3. 

fis init 

4.

load -r -v -b %{FREEMEMLO} openwrt-atheros-2.6-root.jffs2-64k

 Run the command:

fis create -f 0xA8030000 -l 0x006F0000 rootfs

This process can take 10-20 minutes or longer in some cases.  After you enter the command, there will be no output on the screen until the Fonera is done.  Leave it alone until it is finished! Do not power it off or disconnect your session!

 
load -r -v -b %{FREEMEMLO} openwrt-atheros-2.6-vmlinux.lzma

 
fis create -r 0x80041000 -e 0x80041000 vmlinux.bin.l7

This process may take some time like in Step 5.

You're done! Use the "reset"command to reset the router.  Once it restarts, you should be able to see the "Legend" access point.  Connect to it and enjoy your new router.

If you're having problems and can't find the AP, reset (unplug/plugin power) the Fonera and try again.  Give it a few minutes to boot up before you attempt to connect.

Visit the forums to discuss this guide.