I've just tried it in the patched 5.666 and it loaded without issue (dunno if it plays ok or not but it didn't get a 'NOT LOADED' message in the preferences). There's also no odd dll dependencies from a quick check of the dll.
I verified that it works on Windows XP, and I also verified with a disassembler and an opcode checker script that it would work on a Pentium 3 or an Athlon.