Yes but what I'm saying is I have this line in my server.cfg:

set sv_pure 1

But I can still join the server with any custom pak file I want and use it. Like Bright skins, skope mods and so on. It doesn't seem to work once again!!!!!

i know what you are talking about but im pretty sure patches take care of this requiring it to be reapplied each time.

patches just pick start points in the original exe to write to to modify it to the patched version. you insert new cvars the exe wont be able to patched or will generally just fuX0r up.

if spearhead modifies the old mohaa.exe on install then anyone who had used this method on AA would know. apart from that the same will apply when all patches for SH are applied.

solution would be to include checksum verify on the main exe to confirm an unaltered prior version when patch is applied.