Firstly, welcome to LSPDFR!
Just to expand on what @Ahmed4696 has said, he has suggested two very good plugins there and I'd echo his recommendation, though Interaction+ can be a little angry at other plugins sometimes He's also correct about the minicrashreports - those are .rcr files which we can't open, only RPH developers can.
A plugin you currently use, Traffic Policer, already offers a Breathalyser function. I'd recommend going into the plugins folder and then "LSPDFR", and looking for the TrafficPolicer.ini file. This will tell you the controls for that plugin (.ini files are basically settings files for plugins) and you can see what button to press I believe there is also an in-game menu, if I remember correctly.
One last thing to mention, LSPDFR plugins and mods are usually two separate things. Mods are generally additions or modifications to the core game files, such as replacing cars, weapons and clothing. Plugins simply "plug-in", quite literally, to LSPDFR and RagePluginHook. It's all semantics, really, but if you ever need help in the future then you can accurately explain what is/isn't working.
Have fun, and welcome to the community again!
Zen