Hi Kathy,
IN PROCESS inspection will create only for Header material with routing only, In process inspection is not possible for Co product materials, As suggested by Manish add inspection parameters for particular operation(generate Co product in practical) in routing/ use inspection point with Enter text field write as co product while inspecting co product for particular inspection point.
As i said in my previously, as per stranded SAP Co products will generate after completion of products while creating GR only there is no other chance to generate Co product in in process in SAP .