If you have insatlled CodeWarrior for PA 10.5.1, please fellow *\Freescale\CW_PA_v10.5.1\PA\Help\PDF\Targeting_PA_Processors 11.1&11.2
If you want to add a new flash, please follow *\Freescale\CW_PA_v10.5.1\PA\PA_Tools\FlashToolKit\Documentation\AppNote-FlashProgrammer-PowerArchitecture.pdf to create a new flash device.