Email them home and add them to your my games folder.

I've noticed when playing concurrent games that savegame.a doesn't notice new ships created since it was started from savegame.b and so on (Which would be nice actually, if anyone at Stardock want to set the game syatem to refresh designs from that directory when you load a game.), but they are all saved in the relevant directory under your "My Games" Folder.

At work, so I can't give you detailed info, but it's easy enough to find.

Jonnan