When I open it, it goes fullscreen and then crashes. D3DWindower doesn't work, tried compatibility mode and applocale just gave me the same results. Banshiryuu works just fine, though.
UPDATE: Tried Kioh Gyoku and it worked flawlessly as well! No settings or anything! I absolutely love Touhou 3 and this one's no different. It's like if EoSD was a Phantasmagoria and the stage bullets were actually threatening. Why does Shuusou have to so friggin' OlD!?
THE RETURN OF UPDATE'S REVENGE: I just had to put a shortcut to d3dwindower (Didn't need to actually use it either. I dunno how that works, but it did the trick) in the Shuusou folder and it worked, but not before launching it at least once with DirectDraw disabled. It works perfectly at 60fps and 8bit depth (Won't let switch to 16bit), BUT HERE'S THE CATCH: There's a glitch in both gameplay and the music room where music simply just doesn't play sometimes. I might make another topic regarding that issue.