Please purchase CWH-CTP-BASE-HE
You could create a bareboard project in CodeWarrior IDE from File->New->EPPC New Project Wizard->Freescale PowerPC EABI Linker for MPC8641HPCN, then modify DDR2 initialization section in CodeWarrior initialization file PowerPC_EABI_Support\Initialization_Files\Host\8641DHPCN_init_core0.cfg according to your custom board, then click "debug" icon to initialize the target board and download the sample program to DDR and debug it in DDR.
