Steps are as follows...
1. Retract radiator if deployed.
2. Depressurize airlock.
3. Open Nosecone (K)
4. Open outer door.
5. select UMMU crewman to take a spacewalk, and send him EVA.
6. open bay doors.
7. release cargo.
8. Have UMMU grapple cargo (G)
9. Place where you want it., then release (G again).
10. Unpack (U) and enjoy!
Good luck and