Just extract all files to your sierra\halflife\valve directory.

The .tga files should end up in the valve\gfx\env directory
The .wav files should end up in the valve\sound\ambience\highbay directory
The .bsp file should end up in the valve\maps directory

This is a representation of an actual building. Its contents are mostly fictional but 
relate directly to the industry in which it is utilized. It is steam heated which will
explain some of the ambient sounds. Because my intention was to make this as close to the
real deal as I could, r_speeds and frame rates were secondary. On a PIII 600 with the 
equivalent of a voodoo banshee you will get about 20 fps outside the office
area with drops down into the lower teens in a few places. With a Geforce II and 800 
MHz or more, the frame rate seldom drops below 30 fps. Read all the signs and the rest
should be self explanitory. There are numerous secrets to be found, both easy and hard.
It was tested with up to 8 players which would be a good number to start with. This is 
my first map and I hope you enjoy it. Maybe I'll do another.

My thanks to the testers (there is a hidden tribute to the group)
The erie wind and flush sounds are directly from Mountain Hamlet.
The machine guns I downloaded from somewhere and can't remember (sorry)

Thanks to riffraff for the cool Elvis model which I have played with in a modified
version. There is another hidden tribute to it (The modified version that is).

And finally thanks to all HL information sites on the web that make map development
possible by anyone.