Hi Claes and Snarf,
Realizing that my Raspberry Pi board is just too old (version 1 Model B ) for the requirements of Proview V5.8, I've downgraded to V5.4.
My current config is now: Lubuntu 14.04 x86 with Pwr54 and Pwrrpi54 (and all the tools needed for the cross-compiling) in a VM as a development station and Raspbian 8 (Jessie) Desktop with Pwrrt54 (armhf) in my RPi board as process station.
I still have a copy of the old "man_rpi" manual and I carefully followed the specified instructions. Although I managed to build successfully the node for the arm_linux architecture, there is something weird happening when I try to distribute the project to the RPi board: it says "Distribution successful to (NodeName)" but not only, the distributor didn't prompt for a password in the terminal window, as expected, but I also couldn't figure out any error about what could be wrong... Because actually, not any package file has been distributed to the RPi.
/Maverick