the failure you mentioned is typical for a damaged main electric board, sorry...
Here in Germany I talked to a lot of Espace owner who had the same problems
like you have and after the whole car warmed up everything went well.
I also heard from a few guys that an electronic specialist had repaired such boards
without any failure left!
To find the failure on your board is not so easy. Since I heards about this problem
the damaged areas were/are allways different. The only way is to measure all
parts on the board to find the broken item or area.
My Espace was built at the end of '97 and because of that I have no problem
I hope you will find a way to repair the board
Regards from Germany