New Depreciation create

Dear Expert,

                   In asset accounting our main depreciation area is 01. Due to indian law we have need to change the asset life. we have done asset life changed in dec 2014 (Fiscal year jan- dec) and some entry was post in unplanned dep,we have depreciation also post 2014. but client requirment, they want a new depreciation area and want to all asset value as well as before changed the asset life for reporting perpose.

Please share me how can be done.

Regards

Sarvottam