Hi
AAF seems to work fine for me however alternative solutions are below.
OPPQ under "Maintain Planned Orders" --> Conversion you can assign the default order type for Planned orders to Production order conversions.
OPKP you can assign these in the scheduling profile and assign to the material under work scheduling tab (MM01/MM02).
When you go in to CO01 even if the order type is blank it doesn't matter when you enter the material and plant and press enter it will automatically obtain this from the scheduling profile.
Hope that helps
Regards
Adeel