I haven't tried your savegame file, but I played all the way through all the Half Life games without the kind of repeatable crash you describe.

I've had intermittent non-repeatable crashes due to video card driver bugs, and I've heard of people having crashes due to corrupted GCF files, but the kind of crash you're talking about is new to me.

You could also try the Steam forums. But there's a lot of noise there. It is, after all, the place that required someone to invent the posting and you video...