All the narrative for Redring suggests that it would work on the HD. Seemingly at least 3 users with HD boxes make comments on it. However the installation script aborts, saying it is only intended only for the HDR. I loaded BootHDR just in case this might help (dont shout!) - but no, that doesnt make any difference to this issue. I'm new to this - and the customised firmware is hellishly good. Thank you all. I suspect that my confusion, like those of others comes from the fact that much of the text for the HDR is common to the HD. Is there a plan to enable Redring for the HD?