Hey, I took your advices the last weekend but got nowhere :(

I can't really understand why the problem persists and what is causing it.

Imagine the following: Booting the machine, going to OF, typing the command you wrote, hitting enter, the CD bleeps, but I get for a brief moment the splash screen of my current MOS installation(3.1 - in lower resolution however, it must be something of 800x600 instead of my default 1280x1024 Ambient res.), then the CD bleeps again for 2-3 secs and I am requested to choose country/keyboard layout, I click next and get the same error as i have already described ("cannot boot, write in OpenFirmaware boot/pci/cd").

Could it be a hardware problem? If yes where it should be located in the machine? Is it possible to download MorphOS 3.2 from somewhere? Is it still uploaded somewhere?

I have read some simple instructions for a "dirty" MorphOS installation (copy the proper boot.img, reboot, etc, and then run the CD installer via Ambient). Could this work in my situation or will it lead to even more trouble?