[Beck]

You can specify resource percentages in the map editor. However the setting used during the game setup overrides any levels preset on a map for the planets selected as homeworlds. You could set the limits to 250% and set the world as the one you want to start from. Start the game with average homeworlds and the percentages will reflect that average setting and you will get a homeworld with percentages of 103% instead of the 250% preset using the map editor.