I researched this a bit on the net to compare to what I have, as you asked the question as to the releases availability. It is my prior assumption, which was supported by searching the net, that this is a bootleg release. The 6 CD set appear to be originally a CDR set that was made available for download vis FLAC and MP3 via extraction from said CDs. I believe this to be true as it is a match to what I have and when I check for any downloads or links for information, all are of a “pirate” style, nothing official, and all of them appear to be the same core download. Meaning that the availability all show the same pack of files.
I am not sure this will actually qualify as a release at all though, it appears to be a bootleg derived from someones playlist created with a specific intention, then shared online. There is no real artwork I Can find and very few resources/references. Finding this CD6 and asking this question here aside, I would not likely add this as a release on my own as I tend to consider this a non-qualifying bootleg per the guidelines of a bootleg here at MB.
I can proceed however others feel fit. I do have this release in as original form as I believe possible, so I can do as much or as little as others think here. I would actually vote yes on a proposal to delete this release as it sits though.