Go to http://tonystrains.com/
order the Revolution A which is the Atlas/Athern/Intermountain fomat board which will snap in place of your existing light board
order the Hb speaker with enclosure
Solder the motor, pickup and speaker wires to the board
Nice sounding engine
, I've done six Funits and they sound awsome
you may have to sand [220 grit] some of the enclosure to ensure the loco shell seats properly on the frame
Any questions, call them, there none better in the business.
Since you have internet access join some of the DCC/QSI/yahoo groups to educate yourself about installations. Diesels are really easy to install sound in if you take the time to prepare.
Cheers,