I've found a User Manual for .LRN here:
http://eva.unicauca.edu.co/dotLRN%20Manual/
and made a pdf-document out of it (since there's no printable version around on the net). If anyone needs it, you can download it here:
http://rapidshare.com/files/45111989/USER_S_MANUAL_dotLRN_PLATFORM.pdf.html
Thanks to the Universidad del Cauca for this manual.
Regards,
Robert