Unknown (to me, anyway).  Steve said he had intended to organize and catalog the code at some point, but that he hasn't gotten around to it (and not to hold one's breath).  I gathered that the tar ball he provided is a snapshot of (a subset of?) the MWC development disks at the time he was asked to create the archive.  To that end, I suspect that if one were sufficiently motivated one *could* use it to build a distribution of COHERENT, but I suspect you'd have to know quite a bit about their internal development practices and release processes to do so successfully; knowledge that may very well have been lost over time.  Perhaps some motivated person will be able to reverse engineer it, though I suspect it's more useful as a case study than as working code.

        - Dan C.