[Portal Mod] Hetzchase Nailway

This used to be one of my favorite mods. Then the Steam Pipe update happened and broke everything. Note: There are a few graphical glitches since I am using Project Beta as a base. There are also a bunch of frame rate chokes in this mod since Source is not very optimized and I'm running this off a first gen Intel i7 and an NVIDIA GTX 650.