After posting here in the forums, I also tried asking in Klients, where Zerlin instructed me to email support, and they would forward my queston/request to Gameforge.
I recieved a pretty quick response from Marjo, part of which I will paste below:
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Of course you can. The .r2 files are meant to be shared, in the case one
wants to create a story with the help of a friend for example.
We could imagine that with the help of the community you could even
create a fansite to host the .r2 of every scenarios' creators who would
like to share their files.
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Gawd... I love this game!