Hey guys i had the following problem: ( i was playing with a no cd crack for jk2 ) :
i wanted to go jk2 and joined a server.. 5 minutes left and then i moved back to the mainmenu with a text called "Error: Cl_ParsePacketEnitities. end of message"
in a yellow box. So i thought the problem would have been fixed but it didnt and i couldnt go play jk2.

Alright, I have the solution to those who want to play mp without the game cd. If you use a no-cd patch, the mp wont work, so instead of patching the jk2mp.exe, use a loader instead.

First of all, make sure you have a non-patched mp.exe like off the game cd.

Then go to gamecopyworld.com and download the "Jedi Knight 2 v1.0 SP/MP [ENGLISH] No-CD #2" file. This zip has a mp loader that you put in your gamedata direction and execute that starts the jk2mp.exe without actually modifying the file,and your game will be working well again!!