[Theremin]

I'd like to know where i can find the IDs for PlayFrontEndSound and PlayFrontEndTrack functions. I've searched whole LU forum and Wiki and haven't found anything about them. Also I tried extracting the audio files inside sfx.RAW file, they are all name sfx*****.wav starting from 00000 to 03031, I tried using the last four numbers and anyway IDs inside the script seem to play a different sound. So I was wondering which are the IDs to be used or at least what's the file I can get them from.

Sources I used for extracting audio files:
1. http://www.gtamodding.com/wiki/SFX
2. http://gta.wikia.com/SFX
3. http://gtaforums.com/topic/157061-guide-sfx-files-archive/