The HDToolBox... Normally, one would throw everything away and start over from scratch, and guess what, this is what was done for AmigaOS 3.5 and AmigaOS 4, but we are unable to use that code. Right now we don't have the manpower to crack this problem.
Can you please explain this a bit - "but we are unable to use that code" - are you talking about technical problem or is it copyright again. I am wondering if you are able to use bits of OS4 where possible, or is it out of your reach even though it is both Hyperion business?
First few years OS4 was at least partially running on 68K, so there should be lots of C code replacing old asm ones...