Welcome aboard MortuusSum!
Help will always be given at Subsim to those who ask.
I was told a long time ago, that SH4 needs the directx that comes with the game. I'm not sure if that's true, but to be safe, I installed that one. I haven't had any problems, even with later versions of directx.
Now when you're through getting the game to work, we need you to start scraping barnacles. Wolferz needs a lot of help getting rid of them.