I am Jérémy Agostini and I'm Developper for Source Engine since 2008 and my favorite and loving project is Wilson Chronicles !
e3_bugbait is a official map from Valve in 2003 featuring a daytime Nova Prospekt. Remake of this map from City 17, a mod by Frere D'Arme unreleased in 2009.
So...what, do I install it in the same folder?
Install the map in 'maps' folder of your game (City 17 compatible)