Restore them from your backup system. I know, I know, maybe you didn't have one before but what was the plan?
As to today's quest, why not try Windows Easy Transfer on your new machine? It's fairly painless.
Assuming you don't have an external harddrive to use, what would be the best way to transfer 3,000 to 4,000 pictures from an old computer to a new one? CD's, memory card, etc? Not sure which way to go.