Yes that is what I am attempting to do, I had a feeling it wouldn't be as simple as that.....

I have been looking at the table structures and stored procs between RS 2000 Enterprise/RS 2005 Standard. The subscription table structures are practically identical and the data_driven_subscription stored proc only calls this table.

I am thinking of creating the 'original' RS 2000 Enterprise stored proc in RS 2005 Standard and transferring the contents of each XML field that contains parameters (Parameters, ExtensionSettings and DataSettings) from the RS 2000 subscription table to the RS 2005 subscription table into the corresponding field.

Could you see this working?