how do you combine job files from different projects

As far as I know, there are no built-in means in TC for doing this. Maybe, it is something for SmartBear  R&D to implement in future. If you describe the neccessity of such a feature as minutely as possible, they will apply your product improvement idea.



However, the files that contain information about jobs and tasks and other network suite files are xml files. So, you can try merging them outside of TC. Note, that you will do it on your own risk. You'd better create backup copies vefore you try.