Ok I've built my model now I'm trying to have it blow away into the wind as if it were sand. I can get it to blow away as a primitive but the solid primitives are what is being sent. I need to find out a way of having it look grainular without just increasing polys to an exponential number. Any help would be appreciated. Thanks.

Use a source POP to get your geometry into POPs. Then append a force POP and give the force a direction. This will add the particles. Source the particles from the volume without an initial velocity. Then time delay the force effect. Maybe $F > 50 ==1 in the activation field of the force POP(letting the parts build up inside. or just make loads at once). Getting the source geometry to dissolve is harder. You could comp it out if detail is not required?

Possibly render a still image of the geometry. Take it into cops then use the pic() function to initially colour the particles or it might look like your model turns into a rubbish swarm of bees.

Henster

ps use a pop merge SOP to get the particles back into SOPs.