this is a very easy thing to do you just need to put the flash distro in the cd distro file system.
then activate the shell
go to the place you put the image of the flashdistro
and run gunzip.
i may sound selfish in the next line:
If you can’t manage to install in the HD by yourselfs, then you probably should be using a simple router with 3 or 4 options.
The developer has more important things in is mind, like HTTP proxy.