Do you have to name a squad for the FA Cup? If not, then play the kids, and send the EDS manager with them. Any City fans who go should have their ticket price reimbursed by the club.
Get Pellegrini, Kompany, Zab and Kolarov (he's a scary fella) to get the young lads together - Pellegrini to explain why we're doing it, then get him out of the room and leave it to the other three to motivate the youngsters. Let them know it's their chance to shine.
Then, on the day of the match (kick off time) fly the first team out to the CL game - plenty of prep time.