I haven't experimented with this yet, so I'm not sure if it will be of any specific help, but maybe you'll find it useful.

http://www.orbitsimulator.com/gravit...cles/what.html

If you have AstroSynthesis, you might be able to find results similar to what you are looking for. I have the older version and got the following results for earth by regenerating system contents until I got two moons.

Moon One
Orbital Distance - 34952 km
Radius - 128 km
Gravity - 0.02G
Orbital Period - 0.75 days
Rotation - Tide Locked

Moon Two
Orbital Distance - 518415 km
Radius - 1644 km
Gravity - 0.1G
Orbital Period - 42.72 days
Rotation - 884 hours

Such results would suggest that it is possible for two moons to exist around an earth-like body, but working out tidal effects as well as geothermal effects is well beyond the scope of my abilities.