In the folder before the save game folder there is a "setting" folder. Open that, there is a achievements.achievements file in there. I haven't tried it but I think that is the file you need to copy.

I had moved that entire "\Sins of a Solar Empire" folder but looks like Vista didn't let everything transfer, I did it again as administrator and I have my achievements again. Thanks for the help!

Did you get the Space Pony one?...i've played about 12 games so far and i haven't gotten it and don't know how. -sniff-

I got space ponies but not sure when :/

I'm happy spoilers were removed before I got back to this post! I do not have space ponies yet. I'm missing 4 hard AI, I tried several times with 5 hard opponents on Gateway but I kept getting gang banged, I'll try this weekend again now that I have a bit more experience. I'm also missing most of the destroy x amount of ships *(Pirates, traders, refiners, etc.). Aside from the 4 hard I really haven't had trouble with any of them, just playing games with goals in mind while running through the small maps with 1 hard opponent.

Oh and I don't have the wormhole travel. That was funny, first map I saw a wormhole on was the game I was doing military research without civilian so I didn't have the tech to traverse it, DOH!

Happy Conquering.

got space ponies on a random small map

btw. can we mod/add some new achievements ?

I've got most of the achievements now. The ones I'm missing are pop idol (which is broken), and the six retarded ones [play through doing all military and no civilian research, and vice versa, for each faction - there's six long, pointless games I don't have the time for].

I was lucky enough to get space ponies on one of my first games, and I got archiologist on my last huge random map

  Indeed...