matrix multiply of vector

Pursuant to my questions about "Bugs?" on the bug list,

I have a thing I'm trying to do, which I'm sure I'll scrap for an entirely 
better solution soon, but currently this requires that I apply a scale 
matrix multiplication to a vector3f. In this case, I want to mirror the 
vector in the z-axis, and then set the scale of a transform to that vector.
  It's kind of the wrong application, but assuming I find a use for what is 
a standard 3D operation, does 3DKit have a way for me to do it properly?

Brent
--
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