migo for subcontracting process

Hi guys,

In case of Subcontracting Purchase Orders, at the time of MIGO, in excise tab different options are available for selection i.e. Only part1, capture excise invoice,subcontracting challan etc (These options are available even for other POs also except subcontracting challan). Our requirement is that in case of subcontracting POs, only one option i.e. subcontracting challan shall be made mandatory and also if the user selects any other option, the system should give error.

How to configure this scenario? Please advise me as it is our clients urgent requirement

chintu