Particle emitter addition

Wouldn't it be nice if an emitter could randomize which frame it used from among a list of possible frames? :) Not randomly changing, but randomly choosing a frame for each particle it emits which would then remain static for the life of the particle.

Currently, you have to duplicate an emitter for each frame you want to use to gain variety, but this seems like a waste of CPU (multiple emitters vs 1) and time (creating those duplicitous emitters) when the emitter could do the work.