I am really sorry, I have now tried your recommendation, and it worked, thank you very much for your patience. Sorry for "posting-pollution" (I added an update to my previous posting that I tried it juts now).
Is this the only way to access the package contents? I do not permission to change the package namespaces (ie. package my_package; -> package dir_two::my_package; ). I want to leave these stuff untouched.