This is mainly pertaining to a stock A2, I do not know if FO has this option.  I notice here and there, particularly on FF, that there are ships you can download.  Installing them is simply a matter of dropping a few files in some folders.  My question is...  If I did want to add a ship, how would it change my game play?  Also, would I still be able to play against others without the ship?  And finally, How would I be able to build it if it is not modifying any files I already have and not replacing already existing ships?

For example:
http://armada2.filefront.com/file/Premonition;4308x

Thanks!

Ohh monkey trumpets!  Thanks.