WWW,
As someone who has been/is involved with FNPT2 approvals, I can tell you that you are unlikely to get an approved FNPT2 MCC for less than £250k or so - at least not new. A Mechtonix KingAir FNPT2 (MCC) is closer to £400k.
The performance has to be sufficiently close to the aeroplane upon which it is based to satisfy the CAA/JAA and an exhaustive series of QTG - Qualification Test Guide - tests (not far short of those required for a full flight sim) are required to prove this and re-approve the sim on an annual basis. Where available, ACTUAL flight test data from the aeroplanes in question is used and the tolerances allowed are very small indeed. The standards documents used to do this are all defined/controlled by the JAA.
The aeroplane has to climb, accelerate, descend and decelerate at the correct rates - +/- very little tolerance. It has to have the same characteristics with regard to pitch, roll and yaw trim, dynamic effect of gear and flap extension and retraction (even the time taken to lower gear has to be correct). Spiral stability, roll rate, pitch rate, VMCA/VMCG etc. etc. have all to be correct.
Got the idea yet, WWW?
A modern FFS is controlled by PCs, too - or is your knowledge base too low for you to aware of this? Try some research before spouting off on subjects about which you clearly know very little.