Hello @timo-s,
indeed, besides the automation API ( @ChrisHemedinger created a great post in http://blogs.sas.com/content/sasdummy/2012/04/17/doing-more-with-sas-enterprise-guide-automation/ )
http://support.sas.com/kb/40/781.html
http://support.sas.com/kb/56/648.html
Could you search in the communities? I just found this thread: https://communities.sas.com/t5/SAS-Enterprise-Guide/Calling-Including-a-Process-Flow-EG-4-3/td-p/182297
I hope it can help you!
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