[Suicide Junkie]

RE: adding races. Sounds like you are trying to add SE4 classic races to an SE4 Gold game.

Make sure you have the latest (for SE4 v1.50 or higher) Version of each race.

Re: Warppoints. All races can see warppoints at all times. Neutral races are not allowed to warp, but regular races are. There is no way to switch between the two in game.

You could make a mod such that only fighters are available at first (Since fighters can't warp). Only once you've researched ship construction level 1 can you actually build a warp-capable ship.

I don't see the point of having the races start out without the technology to move to different starsystems... you'd just have to sit around in your puny little homesystem and wait for the tech to finish. You might get a chance to build defenses on your planets while you wait, but any random differences in starting location will be amplified.

The lucky player with two breathable planets in his system will be quickly become more powerful than his neighbours who may not even have any colonizable planets in theirs.