This release brings the game up to version 1.5 and probably the most important addition is the online infrastructure support. Anyway, here's the complete changelog straight from the developer himself:
Updates
* Implemented new camera system
* Added aiming guide lines
* Made some small changes to recoil system (mainly for sniper rifles and shotguns)
* Added character type select
* Added spectator mode for singleplayer
* Added round timer in spectator mode
* Made score list sorted
* Changed layout of Options a bit
* Added option to enable/disable friendly-fire
* Added option to choose name
Implemented infrastructure multiplayer
* Implemented Game Lobby
* Added ability to chat
* Made multiplayer less buggy (hopefully)
* Fixed network select (before it wouldn't work if you deleted any connections)
* Limited death indicator to 3 max
* Fixed the buying deagle bug
* Fixed a small sound issue when firing and strafing
* Fixed knife
* Made sure money doesn't go down if you already have full ammo
* Text on scoreboard is now the name of the map instead of "test"
* Made shotgun fire straighter
* Added more custom maps (including river by me )
* Added more guns to iceworld
* Other small fixes that I can't remember right now
Nataku92 included a Readme.txt file with CSPSP v1.5 which should provide you with all necessary information regarding installation and usage. Be sure to go over the documentation first to fully enjoy the game.
And he has added an .exe that you can host servers from your PC
DL: http://pspsource.de/request.php?2505
Users from US dl here: http://dl.qj.net/General-Games/pg/12/fid/15854/catid/195