Works well as soon as you patch it to correct the following :
(...)So, on a hunch, I opened up my trusty hex editor/disassembler and searched for question marks in the YOHO.EXE file from Sorcerer of Claymourge Castle. Lo and behold, a reference to "SPL???.DAT!" A quick change to SPL13P.DAT," and now we have a working copy of Sorcerer of
Claymourge Castle! (...)
-Extract from an Anonymous README.TXT-