As it turns out, it is simply a matter of "crossdressing."  Each of the "actors" ( aka, Body Parts) is followed by a definition of the groups making up that actor:

 

actor Pelvis:1

{

storageOffset 0 0 0

geomHandlerGeom 13 Pelvis

}

It was simply a matter of changing the actor name to the Jessi body part, but leaving the hippo group definition alone:

actor hip:1

{

storageOffset 0 0 0

geomHandlerGeom 13 Pelvis

}

 

This is why a global search & replace did not work because it changed every entry. I had to manually do the changes and then all the meshes came in & the pose file loaded properly.

 

The Hippo Danceth!

 

I'll still have to make changes to the Animation Palette, but at least all of my "actors" are now on stage.

 

Many thanks to noelr for the answer to this puzzle! And thanks to everyone else who responded as well. They are all good ideas and there's always more than one way to solve a problem like this!

 

 

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