From: United Kingdom
I copied one of the Romanian air bases, linked it to the Bulgarian TOE I built, then after I built all the ones I needed and assigned AGs to them I exported the units file and amended the supply/ammo/fuel etc to what is required then imported that back in.
All the AGs were straight forward to create.
The AOGs took a while to figure out, below is how I set it up - not sure if it is correct but it does seem to work.
Bulgarian Air Command AOG at army level - linked to counter on map (done from the unit tab above the air logo space)
1st, 2nd, 3rd and 4th Army coop, 5th bomber, 6th fighter and LR recce AOGs at corps level all assigned to the above
1st F, R and B AOGs, 2nd F, R and B AOGs, 3rd F, R and B AOGs, 4th F and R AOGs, at rgt level assigned to corresponding unit above
Relevant AG units assigned to the respective AOGs above for 1-4 and 5/6/LR up the level above