TyProp and Particle Physics collision

[drawer14]

Am trying to randomize actors and its working fine but I want to use particle physics for simulation , now without props it works fine with one collision sphere but with props I get one for each. am using groups to differentiate them from bones , now I know why is this happening but am asking if anybody knows a workaround or an another way to do this. 

Also TyProb don't generate a skin mesh which might solve my problem here.

Thanks!