Change input emission species

If I want to replace POC in the emis file with POC_X1, which file i need to modify. I want to use POC_X1 represent POC from one specifc source.

Dear User,

Sorry for the delay in responding to your question. I am happy to report that you can now perform this action with the new CMAQv5.3 Beta released in October. What version of CMAQ are you using at the moment?

Ben Murphy