Define status for backend purchase order in SRM7.02

Hi,

i am working in SRM 7.02 classic scenario using PI.

When the SC is converted to Backend PO, some PO XML are failed due to various reason. Instead i need to create a PO in held status.

For the same, we have settings 'Define status for Backend purchase order' in SPRO. If we maintain the information in this setting that is enough..??It will work??

1.I heard there is some enhancement need to done for the same to work ...??if it is what is the enhancement ???

2. if it is work, then all PO will be created in Held status or only error PO will be created in Held status?? remaining in released status ???

Kindly advice me ..

Thanks