Steve, please correct me if I did not understood what you mean.

For each FrameMaker version Adobe makes available specific FDK. For example, there is an FDK for FrameMaker 6.0, and FDK for FrameMaker+SGML5.5, and so on.

I think that perl extension will be almost source-compatible between those versions and I am ready to try it, but unfortunately that old module for FDK(framemaker4) is no longer on CPAN, although it was available several years ago.

I can try writing it by myself, but I want to search existing one first in order not to do already accomplished job.

Courage, the Cowardly Dog.
PS. Something fishy is going on there, or my name is Vadim Konovalov. And it's not.