Romanr... I logged into my FCC license account and can't find which license to apply for. Any guidance on that??
I don't usually check RR until my morning coffee, so I apologize for the delayed response, but it looks like floridarainfanning got you through the application process - thanks to Floridarailfanning.
I would like to add a couple of comments - but you shouldn't sweat them if you're already in the system.
1. The VHF XTS5000 is actually a 6 Watt portable and most of the ones I've seen do actually put out over 5 Watts.
2. The ERP can be thought of as the radio output multiplied by the antenna gain. If you put a 3dB antenna on your car and connect a 6W portable to it, your ERP is ~12Watts.
3. The power you specify in your application is the maximum power you are permitted to use - you can use less, but you cannot use more. For this reason, I suggested that you consider future expansion of your system. If you think you might put a mobile unit in your car later in the 10 years, you might want to apply for a higher ERP (50 Watt mobile + 3dB antenna ~= 100Watt ERP. Again, you don't have to use this much ERP, but this is the upper limit of what you are licensed to use.
Don't sweat this if your application has already been submitted. Start checking the FCC website in a week. When your application is approved you will need to download it. Good luck, enjoy you radios, and thanks for making the effort to do this legally.