Try $bodygroup
Code:
$bodygroup example
{
studio "example1"
studio "example2"
studio "example3"
}
If that doesn't work, merge all meshes of the model into one.
Open up Milkshape 3D, import one mesh with Triangles and Bones checked
Code:
To import: File > Import > Half-Life SMD
Now import all the other meshes but only with Triangles checked and export
Code:
To export: File > Export > Half-Life SMD
There you go, you've got a single smd.
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