@bernd
I have finished a early beta of the
installer, it's very basic and has a few bugs that needs ironing out but it's semi-working for now

I took the liberty to make a lha archive when I archived it, all the files that are in the nov 20 release are there, only difference is I added my installer and has set the executable flag on all (hopefully) needed files.
The bugs:
The installer thinks a directory exists and asks if it should be removed even if it doesn't exist, this can be ignored.
The C:AfA_OS_Loader command is added to S:User-Startup instead of the Startup-Sequence. This works in most cases, but it seems if you save your workbench with an anti-aliased font, it doesn't show up after a reboot.
Anyway if someone tries it please let me know how it worked.
Oh, and about speed on classic Amigas. It was pretty slow, but still faster than I had expected on my 040/40 with a Cybervision 64. On a friends machine with 060/50 and a Cybervision PPC, he said it was very usable! He could hardly notice any difference.