Dude, I would just sell that A1200PPCT of yours. I know they are not easy to come by but, with the money you could buy a cheap second hand Amigaone if you really want to run OS4 and pocket the rest.
I totally don't understand what you've just tried to say.
Um, and I think I mis-stated b-vision SCSI in the 1st place to confuse it further. I mean using the Blizzard SCSI, or the blizzppc.device. found on the 603e+
EDIT
Ok I think I got it now. I can not believe this, that sucks, why?