theres enough hits on this to warrant an answer.

the fix was

create.. 'emmitt from an object' for 30 frames at a very low speed, so that only two particles are released.

instance the two particles as nurbs sheres.

create two objects and use then as goals.

add turbulence to the particles.

key frame different weights on the goal objects so the 'flies' fly wildly about the place for 300 frames or whatever

it works very well when graded into the movie.