Scheduling Question Epicor 9.05

When I use the Resource Scheduling Board  I can change the Resource of an operation to a Resource in a different Resource Group. The problem I have is when the job gets rescheduled it puts the operation back into the original Resource Group because the operation is not changed in the job. Is there any way of doing this without using Job Entry. Pls note we do not have APS. Any help is appreciated Thx.