Having now planned and flown plenty of international trips with the able use of SkyDemon, I reckon it would be rather nice for the programming to have the facility to automatically identify when you are crossing an FIR boundary and to automatically present the FIR ID (eg EGTT, LFRR, EDLL or whatever) either in the PLOG or simply on the displayed chart alongside the crossing point. Such FIR ID changing as necessary when reversing the route.

At present the FIR ID's aren't displayed (or I can't find 'em!) and one has to look elsewhere.

eg Flying Calais to Koblenz one crosses from France into the Belgian FIR (EBBU) thence into the German(Langen) FIR (EDGG) and the reversed route to show change in FIR entries (in this case Germany(Langen) (EDGG) - Belgian (EBBU) - France (Paris) (LFFF).

Is it even possible? 

Thanks for all your ideas and suggestions people - I'm pleased to say that I already do what you say. My GPS 'User Waypoint' files are chock-a-block with cross FIR names.  

Hmmm! Elaborate? I fear I may be teaching granny to suck eggs here, so please don't feel offended .....  Here goes.....

Elaboration 1:- I think you've hit nail on head when you say one will need to put the crossing of the FIR in to Section 18 of the flight plan eg EET/LFRR0120  EBBU0155 etc. That's exactly what I'm attempting to ask SkyDemon to do for (lazy)me - display it on the chart.

The usual EGTT, LFFF, LFRR, EBBU etc etc are easily remembered but it's when crossing from say The Nederlands into Germany (and there are a  number of German FIR regions and then there's Poland of Czech Republic etc etc - One has to search down country borders on the Jeppesen charts , or whatever one favourite info sheet, for the FIR IDs. Lots of hassle for poor tired old me.

Elabortation 2:- I file via AFPEx and thus need to type the EET/LFRR etc  stuff manually - This means my lazy bones have to check the relevant paper charts/Flight info stuff from which to glean the 'name' of the FIR region I'm going to fly in to (LFFF, EBBU, EDLL etc etc ) as explained above. (Of course the IDs will change when I'm retracing my steps). 

Elaboration 3:- When I plan a route on SkyDemon from say Bournemouth to Calais I would file a plan something like: DCT LYD DCT LYD23 DCT with LYD23 being my chosen crossing point of the FIR. I was hoping you'd say it was VERY easy  to simply display on the charted route and alongside the FIR crossing point, the FIR region's ID ie LFFF.

Does that help?  Have I told you I was lazy?