Are you only wanting access via the Amiga? Something like MultiShow
wouldn't be any good for you? I only ask as both
variants are mentioned in the specs. Perhaps you could e-mail the author to see if he could help or provide advice?
Trying a few options, I got the usual flood of links via Google and only a couple of possibilities through a direct Wiki search (not that Google wouldn't have trawled there already). There's been little of use so far and just about zero describing the format adequately or relating it to software.
More if I miraculously find it...!