Here is an updated Galaxy Forge, with all the bonuses and artifacts. Beware though, i made it myself and it can be a little user unfriendly
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Also, it contains the planets/bonuses/etc of the Distant Mod for Diplomacy, so even if you could create a map with some mod-objects, the vaniila diplomacy won't recognise them and minidump.
I noticed that you must overwrite the GalaxyScenarioDef from the Diplomacy/Gameinfo folder with the one from the Galaxy Forge folder in order for the bonuses/artifacts to work.
Here's the tool. Use at your own risk !
http://www.filefront.com/15613593/GalaxyForge.zip
L.E. : Here's a more user friendly version :
http://www.filefront.com/15613845/GalaxyForge.zip