Look on my own site, there is a mod with a small galactic conflict between Rebel and Empire. But as I told you only editing the file that campaignfiles you can activate the EAW old galactic conflicts on FOC.
I understand that you want a small GC because your computer is not too powerfull, I think that all mods should have small GC if they want to see to all the people playing them. On my mod there are 4 GC with only 49 or 50 planets, two with Rebel and Empire on two different SW universe ages, one with three factions and one only with all the Clone Wars units.
my pc is powerful enough its just i want the zc removed from the gc i will have a look at your site tho