Need Script to save multiple FrameMaker 9.0 files as .mif

I am using FrameMaker 9.0 on a PC.

I have a number of UNIX scripts that work on .mif files.

With the older versions of FrameMaker, I was able to run FrameMaker on Unix and use the batch capabilities to create a script that opened the book and saved each file as a .mif file.

FrameMaker 9.0 is not supported on Unix, so I can't do that any more.

I have found references to scripts that will do the conversion to mif on the PC, but they all talk about older versions of FrameMaker.

What can I use to automatically convert all the files in a book to mif files?

Thanks,

Tim Walker