Downloading image to PicoComA5 - nothing works

Trying to install a new kernel (CE6 instead of EC7) to my PicoComA5 and nothing works:
Note: the board came with EC7 preinstalled

1) holding down shift+s does not enter the EBoot loader, instead it goes to NetDCU config utility
2) holding down s does enter NBoot so I used that to download an EBoot image

Sidenote: how can I possibly know if I should follow the instructions in the PDF file "Update instructions for F&S Vybrid based boards." to update NBoot and EBoot???
Just so confusing!!

3) Now entering EBoot works so I type du only to get

:> du
BLUsbDownload() not implemented yet
EbootUSBReadData() not implemented yet

Unable to read image signature.
HALT Reason=0xFFFFFFF8
ERROR: not a BIN file
ERROR !!!!
Disable AUTO BOOT
Reboot system and correct bootloader settings
SpinForever...
+msWait: 1ms
+msWait: 0ms
+msWait: 0ms

It tells me to disable AUTOBOOT but how do I do that?

4) So I tried 'de' and EShell, no surprises there: didn't work at all, nothing happened in EShell

When installing the PicoCom3 some year ago it was exactly the same: nothing worked, the documentation was never really correct, only with the help of this board did I get everything running. And now the same thing again - why does it have to be so hard just to get the board ready for development??

Regards,
Dag

Dear F&S Elektronik Systeme

I would very much appreciate a reply to this topic since I'm currently stuck. I find it quite strange that you market a new board and then provide so little support for the problems some, like me, will have.

Regards,
Dag Hovden