Dont worry about copying all custom content by hand for hours, itll do it in 5 minutes.
Map Resource Extractor Have you had the misfortune to have to manually find ALL of your used custom content? Also, packing every downloaded pack will make the map like 200mb.
This program reads the VMF (Valve Map File) and finds all used content from the custom folders you have specified. Then it just needs you to decompile the used models. From there its all automatically. It has a nice detailed log so you can see whats happening and what errors you get (if you get any).
Read the readme.txt it contains useful information and will actually save you some time figuring out the program.
Some maps contain a few models and textures which can be found in half-life folder, but this tool just searching stuff in cstrike folder. The log which creats after finishing the process is annoying. It is like this : Materials/models/create.vmt not found. Models/props/ brick.mdl not found, etc. May u add a new line? So it looks like this : Materials/models/create.vmt not found. Models/props/ brick.mdl not found. etc.