Shopping Cart status during Upgrade

Hi All

We are upgrading from SRM 5.0 to SRM 7.03. We are in extended Classic scenario. Had few questions.

There would be Shopping Carts in the exisitng SRM 5.0 system. What would be the best policy during upgrade.

• Have the SC in Held status during upgrade and later on process them in new system.
• Have all the SC in ordered status and Approval 'In Process' status so that they can be approved in new system. We are keeping the Application Controlled Flow only and not making any changes to the logic.
• Have all the SC in approved state and thereby have PO created in SRM system. In the new system just do the confirmation.
• Would we face any issues to do the confirmation for the PO's created in old system.

If someone can throw some light on the best policy to be adopted during the cutover stage then it would be very helpful.

Thanks in advance.

Regards

Ashish