First of all, you should never edit the base game files. Doing so, even just with maps, might force you to reinstall should you screw up the file or if you want to play multiplayer. It would be better to copy the map you're interested in and paste it to the "Galaxy Forge" folder in the "My Games" -> "Ironclad Games" -> "Sins of a Solar Empire: Rebellion" folder, like other custom maps.
Second, resources are set on a per player basis. On most maps, the player's positions are randomly determined, so player-0 is not always the human player. Thus you'll need to give every player the same amount of resources unless you open the map in galaxy forge and change the "Randomize Positions" line to false. Then the first player will always be player-0.
