Deacon from blacklight, more or less, he has envmaps, phong, glowing, skingroups, bodygroups for the gear, and flexible physics, enjoy posing.
PS. He's not on the valve biped, and I don't feel rerigging him so people can run around as him and shoot kleiners.
This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below:
BLR Engineer <-- Addon folder!
- BLR Engineer/
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