Loading assets for an acquisition

We have recently acquired another company and now need to load the assets.  I know how to load them to the corp book and have always just done the periodic mass copy to get them into the tax book.  However, our tax group is saying that because of the structure of this acquisition, we need to load them to the tax book with their original cost and any accumulated depreciation the other company had on their books.  Any advice on how best to achieve this would be greatly appreciated.