It sounds like you haven't filled out one of the tabs or entries properly? Is there a "Back" button?
I suggest, if possible, that you go back and do the migration. The time remaining estimates are often outrageous looking but they come down quickly and it usually takes 1-3 hours for 100 to 200 GB migrating over. I remember seeing estimates of 50 hours remaining but it really took ~ 2 hrs. are you doing this through USB or Firewire?
I ended up having to do a commond + Q to get out of the screen. The back button didn't lead you anywhere usual. I had to shut down and start all over without migrating my data. That worked and I was able to get all the way through registration. I will have to try to migrating my data at a different time. I may have to purchase a transfer cable instead of relying on my wifi. My macbook is over 5 years old so the software may be too outdated for the wireless migration to work.
Thanks for your help and reply.