Here's a thought. How about creating a data subdirectory for the Post- Script driver (i.e. dlls/wineps/data). The data could then be put in separate files in that directory without confusing things. (The data isn't interdependent from a build point of view, just from a main- tenance point of view.)
I don't know the Makefile magic necessary to do this, but if someone could step forward with that piece, I suspect it would address both of our concerns.
What do you think?