Maybe if you created/used a shp icon which represented an invisible unit. If you can not see it, then it may be useful for your concept. Unfortunately, I do not think that you can fool the computer/IA, as it will find it as a target even though it appears 'invisible'. As written above, it needs at least one crew member. Which may not give you the weapon you're seeking. An example: I once tried to create suicide bombers using infantry icons as ammo carriers armed with a bomb. It didn't really work well, because the bomber either survived, or was 'born again' as a crew member! Not very realistic. Unless you believe in reincarnation. You can also try creating a weapon similar to a 500lb (example) bomb with range. Give it to an infantry unit. IE: armed with bomb with 3 range. Only one bomb. It could be neat.
