You are going to have to do some interesting work to get this up because the Datetime datatype starts at 1/1/1753. Here is how I think you need to do it.

[font="Courier New"]SELECT

   128624995457225598*100/POWER(10, 9) seconds_since_1601,

   CONVERT(bigint, DATEDIFF(minute, '1/1/1801', '1/1/1953')) * 60 seconds_in_153_years,

   128624995457225598*100/POWER(10, 9) - (CONVERT(bigint, DATEDIFF(minute, '1/1/1801', '1/1/1953')) * 60) col1_minus_col2,

   (128624995457225598*100/POWER(10, 9) -  (CONVERT(bigint, DATEDIFF(minute, '1/1/1801', '1/1/1953')) * 60))/60 minutes,

   DATEADD(minute,(128624995457225598*100/POWER(10, 9) -  (CONVERT(bigint, DATEDIFF(minute, '1/1/1801', '1/1/1953')) * 60))/60, '1/1/1753') AS date[/font]

I think this will do what you need.