Okay, I managed to get a bit further, at least, to the point where I managed to install Ubuntu 32-bit on a VirtualBox virtual computer. However, on reboot after the installation, I got virtual-PC system messages involving a faulty SMBus port and that I should upgrade the BIOS (somehow). After that, the boot gets to the Ubuntu background, but not any further, and then pops up an internal error one or two minutes later, with a request to send a crash report. Considering this is a virtual PC, I can't see myself having many chances to fix this on my own.
After three hours of relatively deep computer stuff, I'm beginning to feel a bit tired, possibly even sleepy, ever so slowly.
And there aren't enough pictures of tired Fillys for me to use in posts like these.