Hi moritz, it is possible for a MoI script to open and read lines from text files.

For an example check out this script:
http://kyticka.webzdarma.cz/3d/moi/#ImportPointFile

Find the one that says that it was updated to also work on Mac, that's the one that uses the newer MoI text file reading for scripting.

Also some description here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=9665.2

- Michael