Hey Shep, it's been ages! Where have you been?
Around TEH INTERNETZ, doing random stuff.
The FB-22 is a tougher proposition because you'll also need different physical properties like dimensions, air-facility properties (parking space, takeoff & landing distances, sensor signatures etc.) which are currently DB-only jobs so you're best off requesting a platform copy from the DB authors and then modifying sensors etc. in ScenEdit.
If I may suggest something? (it may be too late for something like this to show up in version 1.0, but it could show up in version 1.2 or something).
Maybe create a "platform creation" window/box which queries you: DETAILED/LIGHT UNIT CREATION?
Selecting DETAILED means you get asked all the really specific questions like 'takeoff distance in meters', frontal RCS signature in X-Band in dbSM, etc. It would be there for very advanced scenario creators.
Selecting LIGHT would mean that you get asked for basic information which the scenario editor then uses to calculate the other detailed stuff 'black box' behind the scenes. For example: wingspan? Length? Empty Mass? takeoff mass? then uses that to calculate 'rough guesses' -- you'd probably be able to do a pretty good approximation of takeoff distances from the aircraft's thrust/weight ratio, and approximate the landing distance from the aircraft's empty weight (heavier aircraft will need more room to stop, as they're all limited effectively by the same basic landing gear brake technology and drag chutes).
This scheme would have quite a few advantages -- it would remove some of the ??? and guess work from creating your own platform into something the average person could do (look up basic information on wikipedia), and at the same time enforce uniformity in these creations so that the results in-game are not wildly out of variance with the official databases; and the end-user would still retain detailed control over these parameters if he so chose (if for example, he found a detailed 500 page report on the AFB-24 LockMartBoeing HawkRaptor with all the important stuff inside.