Case I approach with four aircrafts in formation, me being number 3 or 4. Possible?

[Hamilton]

Dear friends,

 

I would like to make a Single Player mission, Case I approach with four other aircrafts in formation (fingertip) , me being number three or four. Any tips?

 

I opened an existing CASE I approach mission and I tried to add the AI with the Mission Editor but It didn´t work.

 

Any tips?

 

I thank you in advance.