Hi there, if i remember correctly:
First start ESHELL and Point on the image file
Normally Start into Bootloader using DCUTermi --> SHIFT+S
Set Network Parameters "N" (IP Address, MAC Address, SubnetMask, ...)
Set FlashMemory as target "MF"
Start Kernel after Downloading "L1"
Start Download via Ethernet "DE" (i think it was this parameter, if not "h" shows help)
and then it should do it alone