> 1. Is it possible to create new Super Weapons?
not really since most parts of them are hard coded :(

> 3. How to add Ships in Ts?(all other CnC games have them)
Try to change the locomotor and movementzone parameters, they are responsible for the movement behavior. But if you want to be able to build them too (i.e. how to make a shipyard), no idea

> 4. Is it possible to add RA1 Buildings?
I think so, if you convert the images

> 7. Is it possible to shoot missile that go straight?(like the v2 in RA1)
I think so, too. Just use the normal bullet logic (which the titan uses, for example) with different bullet images.