The software I use requires PHP, MySQL and a web server, but it does produce 100% v5.5.1 compliant GEDCOM.
The only problem I see with your theory is that FMT does not read GEDCOM that is compliant correctly. It drops many good constructs and requires many non-standard tags to connect people up correctly in its database.
Many other programs have similar problem.
I have tried this idea and have been nothing but frustrated with FMT and many of the other programs I have tried!!