Here's a list of all the codes and the ships you get to fly when
use them.

TECHNO		= Experimental PQZ
STORMWIND	= Stormwind - The Elemental
UNKNOWN		= TX SilverCloud
ENEMY		= Captured U-Fighter
WEIRD		= Foodship Nine
STEALTH		= Ninja Star

And for a change of pace use the last code, DESTRUCT.  It will get
you into a weird real-time Scorched Earth game called Destruct.