I'm new to this website and so far its been really helpful, but I can't find the software downgrade for the D1. My system won't run now that i've tried to upgrade the software using a burned copy of the cndv 60mp disk. I have both DVD-R and DVD+R copies of the disk, but no matter which disk is in the system it tells me to eject the disk. I feel like the only option is to downgrade the system and try it again. Does anyone have a better idea or a fix for this problem because right now the system is worthless. Thanks...

To downgrade, you have to get into the service menu and reprogram the System Program and Application Program.
Instructions have been posted several times. Do a search and see if they come up. If not, let me know and I'll post them again.