Alright, that seems to have done it. I can at least get to the title screen, but the lag is pretty dreadful, even with all of the settings set down to their lowest. Any suggestions or is that the best I can probably hope for?
EDIT: Nevermind. I reduced the resolution down to 800x600 and decreased the quality to low, and it seems to be working alright. Still lags a bit in some of the more open areas, but nothing to significant. I appreciate your help, I'm glad I now have a chance to play this spooky game.