Martin for the FPL part, i'll try my best, but yes it will take some time, especially since MUAC has changed, CEL sector is way smaller now and new sector were added in the north (JEV/HOL). As I don't have that much knowledge sectors other than MUAC in this area, I think I'll try to work with the IVAO/VATSIM LoA for the XFL file, they're really close to the IRL ones.
The navdata in itself should be quick, but it's the drawing of all map file that will take some time, I'll keep you updated