The chances from 1st to 2nd edition are:
1) Doors are pre-printed on the new boards.
2) Each board has One Objective and one Pimpweapon crate on it.
3) Half the building Zones on a board are Dark zones (some boards round up, some round down) and every building has at least one Dark Zone.
Item 1 is easy to work with: on 1st ed boards, place doors as in 1st Ed.
Items 2 & 3 can be dealt with by applying small stickers to mark Zones as Dark, and to mark the Objective and Pimpweapon locations.
It would be nice if the CMON staff would give guidelines as to the preferred layouts for upgrading the boards.
It also would have been nice if they had responded to this plea for help. Did it need to be in French for them to understand it?