The documentation page you linked is installation instructions for all Virtuous ROMs, so it's pretty generic. If you look at the description page for Virtuous Inquisition, which is ICS-based, the page does mention firmware. That ROM is based on the most recent 3.32 firmware, which is probably what you want to use. AFAIK, all ICS ROMs require firmware version of 3.12 or greater.
As for SuperCID, I think there are firmware downloads on the forums now that don't require it but it's also pretty easy to do.