Hiya,
- Each race has its own hangar entity file (PLANETMODULE_PHASEORBITALHANGARDEFENSE, etc), and each of them has a line right at the bottom for "baseCommandPoints 2". Command points is Sins' way of saying "squadron"

So modify that number to get more squads.
- Logistic and tactical slots are in each planet type's entity file. For example, from PlanetDesert:
path:CivilianModules
stageCount 5
stage
price
credits 0.000000
metal 0.000000
crystal 0.000000
upgradeTime 0.000000
maxModuleSlotCount:Civilian 12.000000
maxModuleConstructorCount 0
stage
price
credits 450.000000
metal 150.000000
crystal 75.000000
upgradeTime 45.000000
maxModuleSlotCount:Civilian 18.000000
maxModuleConstructorCount 1
stage
price
credits 550.000000
metal 175.000000
crystal 125.000000
upgradeTime 60.000000
maxModuleSlotCount:Civilian 24.000000
maxModuleConstructorCount 1
stage
price
credits 650.000000
metal 200.000000
crystal 175.000000
upgradeTime 75.000000
maxModuleSlotCount:Civilian 30.000000
maxModuleConstructorCount 1
stage
price
credits 750.000000
metal 225.000000
crystal 225.000000
upgradeTime 90.000000
maxModuleSlotCount:Civilian 36.000000
This basically outlines the logistics slot progression. It starts with 12, then goes 18, 24, 30, 36. The same for tactical. You can modify these numbers to tweak each planet type to your liking, or remove stages, etc.
Hope this helps