your falcon 2140 is also listed as:
http://www.airport-data.com/aircraft/2140.html
Dassault HU-25C Guardian (Falcon 20G)
your Dauphine 6577 is listed here:
http://www.airport-data.com/aircraft/6577.html
I would "label" them with the tail number, that is actually visible in your image, then upload pix to the appropriate listing.
The USCG Challenger is also listed under 02 on this site:
http://www.airport-data.com/aircraft/02.html
I personally would list the challenger there, 02 is the current visible marking on the aircraft, then have it linked to N902CG as another ID.
IMPORTANT- When searching the database for two-number IDs as in the case with the USCG C-143 challenger,
one must enter a minimum of THREE digits for search.
If the aircraft is only ID'ed with two digits, ADD A SPACE after entering the two digit search term: example 02 <spacebar> to find all listing with tail number 02.
There are quite a few aircraft with visable IDs of 02 so you may have to scroll down to see the USCG 02.
just my 2 cents (euros?) :)
John