For Cadaver I don't even have the gfx and could not rip them. Mavado proposed to try to rip them. I dunno if he succeeded.
On Gods Country site there are all the maps for all the Cadaver levels. I could rebuild all rooms from those shots and the precious tiles.
Cadaver would be tougher because of isometric stuff I'm not familiar with, object interaction, but there's no or very few A.I. for the enemies and the game could be remade perfectly I think.
But we're talking science fiction here