Managed to make a port of the classical UNIX file manager - Midnight Commander v 4.6.2 (there were big issues with cross-compilation of MC 4.7.* ..). Works fine on my DR800S device, software version 1 (January 2010). Tested successfully on QEMU Virtual machine 2.0 RC2. Is expected to work on DR1000 as both devices now have the same OS.
Prerequisites:
rxvt console installed into Programs/ on your SD card.
Installation: unpack the content of the archive to your SD card. You'll have the structure
SD card
------ Programs/
------------- _mc/
------------- mc.desktop
Run mc.desktop and enjoy
P.S. I removed syntax coloring schemes to have the package smaller. Please comment if you'd really need them.