Bueno, he podido reordenar lo canales, devuelvo el fichero al hmr por ftp luego hago el siguiente paso:
(copia del telnet)
BusyBox v1.1.3 (2009.09.01-02:41+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.
/ # cp /tmp/hdd/volumes/HDD1/dtv_channel.txt/usr/local/etc/dvdplayer/dtv_channel
.txt
BusyBox v1.1.3 (2009.09.01-02:41+0000) multi-call binary
Usage: cp [OPTION]... SOURCE DEST
Copies SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.
-a Same as -dpR
-d,-P Preserves links
-H,-L Dereference all symlinks (implied by default)
-p Preserves file attributes if possible
-f force (implied; ignored) - always set
-i interactive, prompt before overwrite
-R,-r Copies directories recursively
Reinicio el HMR y todo sigue igual, ningun canal me ha cambiado
