You will need to download this program:
Half-Life Logo Creator 2.3
Once you in stall the program, load the image you wish to use.
You can edit it using the controls on the right.
1)Now check the "Save it to:" box in the lower left hand corner.
Set the location where you want it saved.
Make sure you changed the name it is saved as to tempdecal
2)Next click the "Make WAD" button at the top, it will change it and save it to the specified location.
Do not woryy about any change in the coloration of the image, it will be normal when you get in the game.
3)Move the file cstrike folder in you counter-strike folder.
Ex: (if you use steam)
C:\Program Files\Valve\Steam\SteamApps\steam-acc-name\counter-strike\cstrike
When you get in the game do not try to see your spray in the options menu. If you change your spray in the options menu your new spray will not work.
If you have any further questions feel free to private message me or contact me on AIM at Scream0utBlood