Map Analyst can analyze a level (BSP file) for required custom files. If you have own materials / textures, models or sounds in your map, you have to send these files together with die level file (BSP), so the player can see your textures and hear your sounds.
One can also put the collection of all the needed files into the level file (BSP) it self. Map Analyst is a small tool that can do the job for you.
man analyzes HL2 map files and determines all files needed by this map. This includes materials, textures, sound, models, scripts and so on. The needed files can automatically be included in the level file (BSP).
With Map Analyst MAN you will be able to analyze a level (BSP file) for required custom files and include them automatically. Therefore MAN is an ideal substitute for bspzip

The license of this software is Freeware, you can free download and free use this graphing software.