Hi Acrylon
At the risk of sounding self-serving, do you have an Adagio consultant? What you want to do is not straightforward, but it is possible.
If you were my client, I would use ACCPAC Plus and Zippy Import to perform the transfer, but even then it wouldn't be easy. For example, what if the order numbers overlapped? I'm not expecting that you would have a copy of either ACCPAC Plus or Zippy Import lying around, but an Adagio consultant might have access to them.
Steve Schwartz