The project file (say, project.xprj) contains just three things - the path to the input file (say, report.txt), the path to the model file (say, model.xmod) and the definitions of the exports. These exports might be from the Table (the Data View) or from one or more Summaries. One project can contain multiple export definitions.
You can tell Monarch to run, open a project, and perform all the project exports with a one line batch file like:
Hope this helps,