Need To Have 2 Auto Increment Columns (Seed, Increment)

Hello,

I Have a table that needs to have 2 unique number.

detail_id and detail_print_id.

detail_id is already an IDENTITY.

both fields need to be different, because when importing, it imports the same data into a table twice, with only a slight data change (and id is not one of the changes).

So I thought i could do the following:

detail_id INT NOT NULL IDENTITY(1,2),
detail_print_id INT NOT NULL IDENTITY(2,2),
--blah blah

that way, the detail_id will always be odd, and the detail_print_id will always be even. however SQL Server 2005 only allows 1 identity per table, and both these fields need to be auto generated when the field is inserted, so as to prevent double data.

is there anyway I can create a int column to auto increment, without the column being an IDENTITY??

also, I would prefer to not have to create a second table with a single column just for this work.

Thanks,
Justin