HL2 EP1 and EP2 content from the site still doesnt fix errors and missing textures

[RRK]

You probably tried putting the content that Fearless gives you into the Addons Folder.  You should try extracting the stuff you downloaded into the Garrys Mod Folder. (Materials into Materials, Models into Models, etc.). Putting it into the Addon Folder never worked for me. But this works.

It doesn't make a difference really. (Well, unless you have that problem..., but I never had it.) When I used the downloaded content, it was irrelevant whether I put it into Addons or into the seperate folders.