If you're using GalaxyForge to create maps, you can replace the "GalaxyScenarioDef.GalaxyScenarioDef" file in the GalaxyForge folder with a copy of the newer version of the same file from the Sins game directory; after this, any maps you create in GalaxyForge will be 1.03 compliant from the get-go. Note, it may be a good idea to back up the old "GalaxyScenarioDef" file first. Or, come to think of it, you could create a complete copy of GalaxyForge itself, and have one with the old file and one with the new one; just make sure you remember which is which.

As for the instant-victory thing...I dunno. I think it was mentioned in the other thread on this subject that I saw a few days ago, but I can't seem to find that thread any more.



[EDIT]
Found it:
Click me!