it should be enough to replace the exe file and to add all new required graphics.

do the following:

get the zip version download @ www.cs2d.com/download (not the setup!)
extact it to a new empty folder
now copy CounterStrike2D.exe from this folder to your CS2D folder and overwrite the existing file
afterwards copy the whole gfx folder from that folder to your CS2D folder. windows will ask you if you want to replace existing files: click no (for all).

recommended: also copy and overwrite the .bat files and
Launcher.exe

now you should be able to run it with the new version. I didn't test it. please post in case of problems.

click yes for all

No! If he clicks yes, the files of his skin pack will be replaced by the original files. If he clicks no when copying the image/sound files of the new version, then the skin pack images/sounds will still be there (which is what he wanted!)

wait but if he click no than his new skins and other gfx filles will not replace..... WOW i know whats wrong. We dont undestand eachother. I thoght dc mean to put old cs2d to zip file... but that is wrong