When you select source and destination LPARs with combo boxes:
Uncheck Tree view check box in Target Selection group box in Migration
[Shutdown] window. Then, the combo boxes to select source and destination
chassis, HVMs, LPARs are displayed. Besides, in destination group box, the
combo box to select processor group. So, choose the way to select them
according to the system environment.
Migration procedures
3-7
HVM Navigator User's Guide - Migration