Date Problems

I am having a problem in One World XE Procurement. When entering a requisition, the Requested Date (DRQJ) and the Promised Delivery Date (PDDJ) must be greater than or equal to the system date.
I need to find a way to allow those fields to be populated with past dates. JD Edwards will not assist me with this problem because they do not intend for a user to be able to populate those fields with past dates.
I tried changing the "Date Invalid" error that appears to a soft warning in the data dictionary, but then an "Action Invalid" error occurs. I would really appreciate any input into this matter.
Thanks a lot!