How to add assets with an in-service date before first period in calendar

We set up our fixed asset system initially to have the first period as January 2010 as this was the date of the inception of the company.  We recently acquired a company and I am being told their assets need to be added with their original in-service date which goes back as far as 2004.  Is there any way to change the Oldest Date Placed in service int he Systems Control form?  If not, any suggestions on how to handle these assets?  Thanks in advance for any assistance.