This combined wad is ONLY compatible with Legacy and the newest version of Zdoom (not sure why) but if you don't have cab38 or higher - you can get it at http://www.doomwadstation.suhost.com/bloodworks/bloodworks.html and get the version necessary to play this level.
If you would rather use a previous version of Zdoom then you can download a different file from my site at http://www.doomwadstation.suhost.com/decent/bloodworks.html   where I have a different zip file for that purpose. The reason behind this being that the textures are separated in that zip file which for some reason allows the level to be played on previous versions. The combined wad (this one) won't play with previous versions for some reason.
Bob