For all those who might have Audio files on their PC's, follow steps below.
1. Download Police car that supports radio in-game (for example: http://www.gta4-mods...ent-lcpd-f17568 ) [or edit one - change vehicle ide for police vehicles to be able to listen to the radio then transfer the recorded the live feed or feeds to your user music and listen to it in game...]
- if you have mp3 file just copy to My Documents/Rockstar Games/GTA IV/User Music
- if you have other extension type use this completely free converter (http://www.pcfreetim...m/download.html)
2. If you don't have the file/audio you can find one (the one you like ofc) on YT (there are planty audio/video files there)
3. Open the video you like and copy address
4. Go to KeepVid.com and paste your URL of the video
5. Allow Java to run, you'll have multiple options to select from, select the last one (Snipmp3 to save file as mp3 to your HDD)
6. Just drag and drop to your User Music folder and viola, enjoy!
**Note the you must have Java installed to be able to download from KeepVid.com, also you might wanna pause AdBlock until download is finished**
This is just for all those players who would like to have own audio files in User Music folder. These sites are scaned and used many times before so you don't need to worry about viruses or anything (just in case scan it again with your antivirus software)
Just to try it out (with this specific model - Vincent Police Car, I've uploaded 2 popular audio files for you to try (movie effects chatter and another live random chatter from NYPD)
Audio Files as .rar - Download
Sorry guys for any mistakes in text, I'm from Croatia, hope this helps / works for you.
[EDIT] Someone from the other forum just asked me for help because mp3 doesn't work always... just use FormatFactroy and convert into WAV if mp3 doesn't work. Post above on how to add radio in police cars... Stupid me