Are there around someone who have fond a different set of rule, either hand
made or published, that fit Birthright ?

Nadastor, Wizard of the Black Robes

I'm just planning to start a birthright campaign with the SAGA system
developped by TSR for 5 Age. This system speeds up play and will, I hope!, let
my players concentrate on the story not the rules. I converted the battle
system to keep using the great cards of BR.
May be I'll post something later.