Ah yes I was indeed looking at the 6610! How do I know if I have a C12 model, I've only ever seen one 6450 in the flesh?no, make sure you're in the ICX6450 folder from the zip. It sounds like you're in the FCX/6610 folder. Follow the guide exactly (make sure you're on the guide for the ICX6450 and not the fcx/6610) - the guide will use the exact filenames you should be
EDIT: Ah sorry a quick google shows me it's a teeny desktop switch, I don't have one of those
Thanks again for your help!