I researched a bit harder and found a few things, and what Hidden said as well. I managed to get it running and what not, but CS:S content still won’t load up. Here’s my gameinfo:
title2 "== episode two =="
SteamAppId 420 // EP2
ToolsAppId 211 // Tools will load this (ie: source SDK caches) to get things like materials\debug, materials\editor, etc.
AdditionalContentId 240 // cs:S
And i really don’t want to take the easy way and rip out the textures and models, seeing it will raise the file size by 400mb or so