Hi Larry,
If you want to continue with the Logistics Cockpit DataSource, then you might face some technical limits. If particular fields are hidden or disallowed, then it usually has a reason. Please refer e.g. to SAP Note 328255 - Not all fields provided in Customizing Cockpit. In this SAP Note and the related ones, you can find some explanation.
Re. changing the STATE field in table TMCEXCFS, I suggest to give a try. You have to test it carefully and if works, then it's up to you.
The alternative is creating your own Generic Extractor. If you are more comfortable with this solution and you know how to do it, then this might be the choice.
Best regards,
Sander