Multiplayer mode problem

As I have several computers running FS, I thougt about starting a multiplayer session to make screenshots of several aircrafts flying in formation.I was very disappointed because the multiplayer mode works bad, even if the computers are on the same local network, which is very fast. Viewed from one of the aircraft, the position of the other aircrafts is updated very strangely, at a low frequency (around once per second) and the aircrafts look like jumping from a position to another while in flight.Is there a way to change this? Is it possible to configure FS to have a better and more accurate position refresh for the case of LAN usage?Thanks for any help !!Eric