Spacecraft don't fly very well in FS2002 unless they are aerodynamic. I haven't seen those you mention but I've tried the Alien Dropship and it just hops up and down and then flips over on it's back.
If you want to fly spaceships try Orbiter. It's a freeware space flight simulator that focuses on realistic orbital mechanics. It takes some learning and practice but it's a great program and it's free.
http://www.medphys.ucl.ac.uk/~martins/orbit/orbit.htmlOh, one thing, Orbiter doesn't come with sounds so you have to download an add on sound program. There'll be a link on the site to direct you to the author's site. He also is in the process of making an add on ship that has some amazingly detailed flight systems. It's worth checking out.
There is a gun effect. I'm not sure exactly what the file name is but it's for the default Corsair. It gives you firing guns (no sounds), tracers and falling shell casings.
