I found that switching gun sights was the key to a successful jabo. Originally, I switched from the default.bmp to the werewo.bmp sight. This sight has a center dot, 2 concentric rings and intersect lines point in the four main directions, North, South, East, and West. I found on a 45 degree angle of attack, if I kept the point where the bottom/south intersect line passes thru the outside circle, lined up on my target, then dropped between 1.5 to 2.5k the bombs would hit most of the time. (remember to pull up or turn off after drop so you don't fly into you own blast)
Prior to version 1.09, you could use the intersection between that bottom line and the inner circle to accurately fire rockets. However in v1.09 HTC changed the rocket's flight characteristics to now that point is to low, you now need to aim between that point and the center dot.
Finally, after using that sight for a while, I got tired of having the circles block my view when all I wanted was the intersection points, so using microsoft's paint program I edited the sight and created the sight shown below. The bomb point is accurate but I still haven't modified the rocket aim point, so if you use this you still want to aim rocket between that point and the center dot.
Oh yea, practice a bunch off line...it really helps.
