So I recently installed Jackhammer - it's really cool and works great, except it gives me an error every time I try to run the level (something about a missing file). I decided to try Hammer itself, loading it from SDK as normal (out of Half-Life 2). First off, the grid was missing. Shift+R just made the two crossed lines that were there go away, so problems. I tried to load a trainstation map, and it gave me an error after it was 5% loaded, claiming that a model was missing. Then it crashed. That can't be right, because again, I was running it through HL2. And since I am, the AppID shouldn't matter. Can anyone help me?