Depreciation spread in the last year of asset life

Hi everybody ,

I have a requirement that can be explained with the following example :
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The Fiscal year (FY) runs from January to December.

Lets say an asset is entered with DPIS in March 2011.

In FY 2011 it should depreciate March to December.
In FY 2012 it should depreciate January to December.
In FY 2013 it should depreciate January to December.
In FY 2014, lets say normally the life would expire in March, but in this last FY, I need the depreciation to be charged over 12 periods, January to December.
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o I am talking about assets becoming fully reserved/ life expired (not retired), so the retirement convention will not come in to play (that only comes into play when as asset has a retirement transaction entered).