SAP PP Certification

Dear All,

I am working on PP module & planning to take certification in

TSCM40 u2013 TSCM42 - mySAP SCM u2013 Planning with mySAP ERP* 2005,

Can you Pl. guide me on the topics that i should be thorough, Can you pl. help me in getting the model question papers for refrence.

Regards

Manu