OK, one with the knowledge of the Stars! file structure can workaround all of these limitations, but even with these knowledge you have to manually edit about 20 blocks in each player m file, then edit about 20 blocks for each player in hst file, then make changes in xy file as well. I was doing such setup for Wheel of life IV and believe me that a lot of manual work. I was trying some available scripting alternatives, but they hardly can do what you really need to do.

At a time when Wheel of Life V was being created I finally come up with a tool (StarsPlanetMover), which just takes planet ID, target planet X and Y coordinates (which are not limited by height or width, other then size of universe of cause) and... moves it with all its' content to the new location, then updates all references to that planet (like orbiting fleets, waypoints, in game events). The game was remapped successfully and as far as I know it was played without any issues up to the end. Now I think its' time to publish this tool, may be within a week (just need to make some minor polishing like command line validation etc.), since it will make setup of such games much much easier. And this may open a lot of possibility to setup remapped games.

Some technical details: yes, tool works thru encryption (no passwords required either players or host, but SAH games have no host password anyway), and updates xy, m, hst files. As to security concern as I've already mentioned, while decompilation of such a tool is possible, but a smart beginner level developer can get decryption code from this forum much much easier within a minute or so (I can't give you more details, but Ron know what I'm talking about).