from what I read you want more starbases in each gravity well, this is controlled by a line in each of planet/star entity files (and near the end of the file is the line you want (both trinity AND rebellion use the same code for this)
maxStarBaseCountPerPlayer 1
just change this line in each of the planet*.entity and star*.entity files to the number that you want but do NOT attempt to alter the game files in the program files area, DO create a MOD in the mods area for the release & version you are playing and put the entity files in a GameInfo folder in the mod.
just one warning, the game engine only uses a SINGLE cpu core, and it has to track EACH ship/strikecraft/mine/planet and piece of junk/asteroid AND render it, so I suggest not increasing it too much and also decreasing the max mine count as well (as it is in the line after the starbaseperplayer limit.
hope this helps
harpo