I have a custom player model. I can make it work on an offline server, such as "instant action" by entering sv_servermodels 0 into the console. When I try this on a dedicated server, such as galt's gulch servers, it doesn't work. does anyone know how i can make my player models work on servers?

I believe the server needs the pack as well.

The server needs the models, "sv_servermodelsonly" set to "0", and if you want others to see the models as well (i bet you do) you also have to configure the autodownload accordingly. (a valid entry in the "curl_urls.txt". Read "mapdownload.txt" in "Nexuiz/Docs" for more details)