Freestyler DMX - Help!

Bit of a random question but, does anyone here know how to setup fixtures from scratch in Freesyler DMX for windows or is there a way to import/convert .ssl files from other software to .pff?

I need it to work on a Kam Cob Parbar WFS. I've found fixture files for this in other software but, the other's are not compatible with my usb dmx controller & also the .ssl fixture files are not recognised in freestyler.

Any help would be greatly appreciated.

Thank you.