For a while I would create maps with only my own custom content and vanilla CS content. But recently I started wondering why I don't use some HL stuff. Despite being sold separately on Steam all of the HL content is still installed and the CS install is still set up like a mod. Just to be sure I wouldn't run into issues though, I even had a friend who owned CS 1.6 but not HL1 run a test map to make sure all was good, and it was.
So, with my latest map, I utilized a scientist and barney model as well as a few different sounds and textures. I submitted it to be added to my clan's server but the admin listed out all of the HL sounds and said he needed them (he did not, however, list the models).
Is this typically a problem with servers? There are plenty of other custom maps that utilize HL1 sounds and they're not copied over into my cstrike folder (unless they also renamed them). Is there a reason why a client would have no issue running the map while a server would?