Try my sights:
http://4wing.obviousonline.com/the ones with the circle and line, use the 6 oclock position on the circle where it intersects the line as an aim point of the rockets.
Make sure you are flying level with no slip if as rockets will travel in the direction you are going NOT in the direction you are pointing.
For bombing, its a matter of feel, practice practice is the best advice. I usually try and dive fairly steep and use the top of the nose cowling as an aimpoint. As soon as I lose sight of the target I will release and pull up. Usually around 3-4k or so I think...
Against CV's I will use same tactic but pull out higher
SKurj