Framemaker 5.5 and LINUX

Hello,

I'm working on Framemaker 5.5 migration on a professional project.

The OS used is LINUX RED HAT v5 and v6, but there is none Framemaker for this OS.

Can you give me solution to migrate complex document (several *.fm files composing one document generated in PDF) on an editor on LINUX OS?

migration to WORD or OPEN OFFICE are not efficient, so I hope you can help me to find a solution for a such migration.

Regards