Fixed Assets Opening balances upload

Dear,

I am going to migrate the FA opening balances, I would like to know the following points :

1) Asset start date should be the original Asset start date like: asset original purchase date  is 01/01/2013, so when I will move in the system so I will use the same date because they will provide the accumulated balance as of 31-DEC-2014.

2) What should be the Method Computation in Depreciation Default Coding , "I" or "P" .

Thanks