Xurton

I was attempting to install the Realistic American Sirens mod and in specific the Federal smart siren when I noticed that the limit for vehicles.awc was 15.7mb. It turns out that my vehicles.awc is already 15.7mb and if i try to to install any of the sound packs from the mod it goes over the limit and I hear no sound. I have no modified the vehicles.awc in any way before installing this mod and the only files on it are vanilla sounds. Is there any way someone can give me a smaller version of this file or is there a way to work around this limit or anything? Thanks.
OpenIV is latest version. GTA 5 is latest Version. Latest version of Realistic American Sirens mod.

 
Thanks for all the help. I have also tried looking around the forums and don't find any solution.

Hello I am trying to install the crown victoria sound mod V2 http://www.lcpdfr.com/files/file/8689-crown-victoria-sound-mod-v2/?page=2&tab=comments#comment-77409
 I get this error when trying to put the OAC file where instructed... saloon_7_us_v8.oac(Line 1): Not supported format version, actual: "10" but expected "11".
 
Can someone please send me a fix or a working file. It seems to be a problem with the new update. I followed all the steps EXACTLY and have tried over and over again and did everything in administrator mode.