STOP PRESS Marcos_!
I didn't realise (until reading some related post) that the hypercon tool (used to generate the config file for Hyperion) now has an automated install tool.
(be sure to have a copy/backup of your hyperion.config.json file)
Started hypercon (java -jar ./HyperCon.jar)
Clicked on the SSH tab
Entered the ssh params to login in to OSMC on the Pi.
Clicked on 'Connect'
Clicked on 'Remove Hyperion'
Clicked on 'Inst./Upd. Hyperion'
Clicked on 'Local Config Path' (made sure it was referencing the config file I had created earlier)
Clicked on 'Send Config'
At this point the interface appeared to lock up so I killed it and checked to see if the config file was in /etc/hyperion and it was.
Finally - rebooted the Pi
Got the startup led swirl!
Clicked through a few screens and started a video... AWESOME!
Everything appears to be working correctly!
The GUI response time may be a bit slower so I may push the clock speed a bit - In the meantime I'm off to enjoy the splash of colour!!!
Good Luck!