Generating one's own ICAO Code in FS 2004

Hello Chums... ;)...!
Together with my LAGO FSE, Abacus' EZ-Scenery, Runway3, and AFCAD (for positioning my VOR and NDB beacons) scenery design programs, I often design my own private runway Airstrips, complete with various objects, sometimes in the middle of nowhere!.
I place them into my Scenery Add-On Folder...as you do...and they work fine...;)...!
How does one generate ones own ICAO airfield code, together with the name for them, so that they appear in the drop-down list under "World > Go to"...?
(They are located at particular Compass N/W locations).
At present, because they are not part of the existing ICAO code locations, I can only load them via my "Saved Flights" list.
(It has been achieved with the "SIMV" ICAO Code for locating the Simviation Airfield)....
...how was this done?....
...!
As an example: One of my designed airstrip runways, objects, NDB beacon, boating lake, and camping site, is located on the Pacific Coast, at Point Reyes in California.
How do I give this airstrip its own ICAO code to appear in the Flight Sim list of ICAO codes and Airfield Names for quick access..?
I have these little Airstrips dotted all over the place!
It obviously must not conflict with any existing ICAO codes and Airfield names...!
...any advice will be rewarded with a Chocolate Cookie...(or maybe, even three!)...
...!
Thank-you, Chums...
...!
F....G-BPLF...FS 2004... 8-)...!
Together with my LAGO FSE, Abacus' EZ-Scenery, Runway3, and AFCAD (for positioning my VOR and NDB beacons) scenery design programs, I often design my own private runway Airstrips, complete with various objects, sometimes in the middle of nowhere!.
I place them into my Scenery Add-On Folder...as you do...and they work fine...;)...!
How does one generate ones own ICAO airfield code, together with the name for them, so that they appear in the drop-down list under "World > Go to"...?
(They are located at particular Compass N/W locations).
At present, because they are not part of the existing ICAO code locations, I can only load them via my "Saved Flights" list.
(It has been achieved with the "SIMV" ICAO Code for locating the Simviation Airfield)....
...how was this done?....

As an example: One of my designed airstrip runways, objects, NDB beacon, boating lake, and camping site, is located on the Pacific Coast, at Point Reyes in California.
How do I give this airstrip its own ICAO code to appear in the Flight Sim list of ICAO codes and Airfield Names for quick access..?
I have these little Airstrips dotted all over the place!
It obviously must not conflict with any existing ICAO codes and Airfield names...!
...any advice will be rewarded with a Chocolate Cookie...(or maybe, even three!)...

Thank-you, Chums...

F....G-BPLF...FS 2004... 8-)...!