Does Gmod hate me? Texture AND Model problems...

I started a thread a while back, about errors and purple and black textures in 99% of all addons, (Like the skylife map…), and I was told to buy Counter Strike Source. $20 dollars later, I restart my PC, and NOTHING is different. I check GMod Settings in the ESC menu, and the CSS box was checked, along with Half Life 2: Deathmatch, Half Life 2:Lost Coast, and Team Fortress 2…

An example of one of the missing textures is the cave wall texture in Skylife, and it looks like I’m missing foliage, because in skylife screenshots, there are trees in the place of my errors…

What should I do?

Skyline?

[editline]10:20PM[/editline]

It could be episode 2 textures etc, could you post the link to the map?

Oops, its Skylife, not Skyline, sorry.
Linky: http://www.garrysmod.org/downloads/?a=view&id=96125
P.S. I know in the Desc. it says “You need episode 2!!” but Skylife is an example. It’s like that in MOST maps…
Also, don’t Lost Coast/Deathmatch have the same textures? I also have the Halflife 2 Demo…