Firstly, listen to all the audio clips and see which one you'd like and then read the following installation guide:

1. Drag & drop the selected audio file into your \plugins\LSPDFR\PanicButton folder.
2. Either delete the existing panicbutton.wav or create a folder called 'backup' and put it in there.
3. Rename your new audio file to 'panicbutton.wav'
4. Test in-game that it works.

If something goes wrong leave a comment and I'll get to you.