I know this is sort of an older post, but i figured if it hasn't been resolved i think i can help. An easy way to get the particles to conform to the shape of the sphere is to use PFlow, replace the position icon node with the position object node then change its settings to surface in the position object parameters. You also may want to drop the time of the particle start & end to Z3R0, that way the particles are always there no matter how you move the time slider. To disburse the sphere, just add an age test to the last event, giving it a frame time to start, create a new event with find target and move the find target object outside of the screen or camera view. All the particles that made up the sphere will find the find target object at whatever frame you chose it to. Of course you can play with the speed and the way the particles travel between the sphere ant its target to refine it. This is only the case in 3DS Max that i know. I hope i helped.