Another thing to be aware of with the FS Atis (at least for FSX), is that the "ATIS INFORMATION" (for a given airport) is not the same for each pilot.
When you start FSX, the Atis information for a given aiport will auto-incrememt, each time there is a significant change, so the LETTER that it currently is, is more an indiaction of how long your SIM has been running, than anything else.
So when you hear your ATIS, say at KLAX say "INFORMATION DELTA", someone else also at KLAX could be listening to "THEIR SIM's ATIS", and might hear INFORMATION HOTEL.
This would seem to lead to two option in PE.
Either pilot tell controller he has say "INFORMATION BRAVO" and the controller (and Pilot) , knowing the above limitations , accepts that, despite the previous pilots might having called "INFORMATION HOTEL"
or
PIlots ( more unrealistically), are forced to say something like "CURRENT ATIS", or "NUMBERS" to avoid this confusion.
Keith, maybe you can give a ruling on this, I suspect choosing the First Option, keeping the Phrasiology correct, and making everyone aware (especially the controllers) of the SIM's limitation, to avoid confusion.
Simon