I thought this too, but you did not wrote it detailed. I think, you do not have to mount the CD on real CD32 machines, it must know it by ROM (it would not boot the game. eg CD0: alredy mounted). I never tried to install AmigaSYS on CD32. In theory it should work, it is AGA. But i think, the CD32 knows the CD handling by default and you don't have to mount it. But i do not know, what will produce a CD swap.
Nice config CD32+SX32pro!