Using groups or masks to control Pyro effects

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Hi-
Can anyone tip me off on how to use a group or object to control a pyro fire effect? Basically, I've applied fire to a box and I want to have half of it engulfed in large flames and the other half in small flames. I can do this in a geometry node with groups and control particles but can't seem to figure it out while using pyro effects. Any solutions?

Thanks!
I want to do visual effects for a CG animation studio.
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you should be able to do that using one pyro solver.
Seperate the parts in SOPs (grouping or isolating with delete/blast SOP) and use two different source volume SOPs with different density and noise settings. Then in DOPs you can import the sources with 2 different nodes, merge them and feed them into the pyro solver. In those source nodes you can again control the density, fuel and velocity of each source.

best,

Manu
http://vimeo.com/user2522760 [vimeo.com]
http://stormbornvfx.com/ [stormbornvfx.com]
Manuel Tausch
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