Can't figure out breaks in ensemble scores

[Carlos Martinez]

Hi, 

I am not able to figure out how to manage the breaks in the score generated by 
different files. 

I have setup the different files or parts example: Violin I, II Cello and 
Viola.. 

The score appears when I use \include. But the way it lays it out it goes like 
this

Layout of the score….
2 measures
3 measures
1 long measure
4 measures

I would like to manage where the breaks are…

Help…

Thanks! :)