PPF and Message Type

Hi ,

1. How to change the message type ( W to E) in EWM for Class Message class_________/SCWM/PI_APPL (Error Messages of WME Functionalities)

2. How to trigger PPF to create WH Task when we perform Goods Receipt through Vehilce ( /SCWM/VEH) or /SCWM/CICO?

. PPF is triggering when perform Goods Receipt thrugh /SCWM/PRDI.

Thanks