This is version 1.1 of Kaleidescoop's Sniper_029 recreation in retail Half-Life 2.  
To install, move the "scoop_sniper029_remake" folder to your SteamApps/Common/Half-Life 2/hl2/custom folder. 
If you don't have a custom folder in that location, make one and move the mod files into that folder. 
Load the map through console (~, enable in Advanced Options>Keyboard>Enable Developer Console)
Type in "map scoop_d3_c17_09a" to start the map.

(Also if you know how to use Faceposer and make scenes that would be great since I can't get the thing to work so I'm just using ambient_generic arrrrgh)