Hi Lindsay,
Probably you can try creating a 'Variant Transaction' for SCU3. The below resources should be helpful.
http://scn.sap.com/docs/DOC-27275
http://help.sap.com/saphelp_46c/helpdata/en/bf/ec07845db911d295ae0000e82de14a/frameset.htm
Regards,
Sajib.