There is a particle cloner in the tools section if i am not mistaken.You could use it to extract particles from one model and add it to this one.(I never tried that myself but shouldn't be too hard)
You shouldn't be using the cryect tools of course viewtopic.php?f=59&t=797orviewtopic.php?f=59&t=815 to edit the particle.
Did you remove the secondary seat?