Feasibility to add a new list header in COOIS to display operation details of planned order

Dear experts,

In ECC-6.0, I have a requirement of including a new list header in t-code COOIS to display the operation details of a planned order. I did the customization setting with t-code COISL by including a new list but i am not getting the output. Please let me know if we need to use implicit enhancement like LCOWORKF06? Please provide your inputs

Regards,

J.balakrishnan