TO change the user status in the PM order

Hi,

My requirement is that a techician is assiged to do the work using MRS and based on that user status is update in the PM when the save button is clicked on the MRS board.

Now according to my requirement if anybody click on the save button and the technician is assigned to do the operation is done through MRS than the User status in the PM order should get changed.

As a part of standard functionality the user status is not updated.

A new user status is created in the trasaction BS02.

Can anybody please let us know how to achieve this functionality

Thanks

Mohit