How to change the gun fire of CS 1.6, such as all-star swearing (German boy heads, etc. )

For example, if you want to modify the gunfire of ak47, you must first prepare a good sound file, and then rename it AK47-1.wawapak47-2. Wawak has two kinds of gunfire. You can copy the sound file and modify it. Then put these two files into this folder cstrike\sound\weapons, and you will be prompted whether to replace them. Just click OK, and so does the gun type. If you want to save the original gun fire, you can copy the original file in advance.