smartform for ME22N

Hi experts,

Iam trying to create smartforms while saving message

ME22N->po no-> Header-> Messages-> Save...!!

By default iam getting SAP script forms. But i need

smartforms.

Could you pls tell me what i need to do to get smartforms?

Do i need to create my own print program and assign into NACE - PROGRAM ? and my own Z smartform? Iam using all these details.

Output Type NEU

Application EF

Still what i need to do to get smartfrom.

In the SP02 i should see my smartform before printing...

Thanks

Kaki