I get the system to boot from the swap partition with runbootblock, but then I get stuck because I simply cannot read the text. I have a CV64/3D graphics card, but the installer uses the Amiga graphics, which I can't display.
Not sure off the top of my head - if runbootblock runs the real bootblock, you should have a short pause before it begins booting. During that pause, you can hit a key and type your own boot flags. Assuming you have AGA, add the -A option, and you should get a 31 KHz screen.
I assume that everyone assumes - including Commodore - that everyone will have a display for their Amiga's native video. Kinda backwards, yes!
John