Start with this telnet command :
This creates a swapfile on usb to the value of 128mb and creates an image with bootloader ss76.
Modify the bootloader values to suit the backup you want to make.
enigma2-plugin-systemplugins-nfibackup_20091024..rar
This plugin is an IPK package.
To install ftp to /tmp and change attributes to 755.
Use DCC to install.