Can we upload old POs/stock data by using LSMW.

HI Friends,

I am implementing MM module.

I would like to upload existing POs and Stock data into SAP R/3.

Is it possible with LSMW?

If yes, what T.code to be used for Stock data to upload.

If not, please give me any other way to load it.

Can anybody help me in doing so with steps involved in it

Matter is little urgent.

Thanks & regards,