Hello,
First off, great mod... Works VERY WELL.
I've got one suggestion: allow multiple manual siren tones. For instance when I am running wail I temporarily switch to priority when the traffic is heavy, and when running yelp or priority I sometimes switch to back to wail momentarily. Just like in real world officers switch their siren tones all the time... It's easier to do using the manual siren feature (played when a button is pressed) than "manually" switch tones using 1,2,3 etc.
Also it'd be great if we can configure whether the main siren is interrupted when the manual siren is played for each manual siren tone.
Thanks!