ship set change?

[Merry Jolkar]

I am hosting a game in which a player chose the same ship set as one of the A.I. races. This is leading to confusion!
1) Is there some way the player can change his ship set?
2) If not, is there some way the other players can make his ships appear with a different shipset?
3) If not, is there some way to tell whether a particular ship is his or not?
Many thanks in advance!
Merry