chridmill

What does your file structure look like out of curiosity? I had this problem too, the game would freeze and Ragehook would terminate due to it freezing, the game would then slow to a crawl and I had to terminate the exe via task manager. 
Do you have an LSPDFR folder in your main directory? along with the other required folders and files? If you look in the Plugins folder there is actually another LSPDFR folder contained in there, it contains all the audio/Police scanner files that play during a callout and during the course of calling for backup (newly introduced in 0.2 of LSPDFR). I don't particularly know what causes the problem, as it looks like it's indeed trying to call an audio file, but combing through the files it all seems to be correctly installed.
It seems to be rather sporadic in the crashing of LSPDFR too, it only seems to ever crash during the call of an audio file in the very beginning if I call for backup during the initial setup phase (precisely when my car is spawned outside of the station I went in. If I wait for approximately 5 minutes, accept a Callout or do a routine traffic stop the calling for backup seems to work as intended, it's odd.