Vice is a command line tool that will decrypt and encrypt .ctx files. CTX files are encrypted text files that have weapon and player class settings that can be modified. Items like, health, speed, ammo, allowed weapons, etc...
The attach file has vice.exe and 2 batch files with an encrypt already configured in the batch file. Valve will encrypt certain CTX files with different passwords so you will need to confirm a correct decrypt before encrypting and using the file.
1) Extract all 3 files in the directory with your ctx files.
2) Run decrypt.bat to decrypt all the ctx files in that directory to .txt files
3) Modify the txt files to fit your needs
4) Run encrypt.bat to encrypt the files back to ctx files
The server has to be restarted from scratch before the settings will take effect.