Hi Chris,
Please let me know whether you have chosen the below method for setting up target system.
Software Life-Cycle Options->System Copy<database>Target System<Distribution option: Central System / Distributed System / High-Availability System>Based on <Stack option> AS ABAP and Java / AS Java / AS ABAP>
Database - Select the Database Instance Installation Method
Standard System Copy/Migration (load-based):
When you choose Migration it will asks for the Migration export CD image which you have exported during abap DB export which you have to provide here.
Thanks and Regards,
Kunal Gahlot