Thank you both for your replies!
You know, this particular sectin of the fora suffers repliers - all the world reads topics but unfortunately only very few provide feedback. Thus, yours is truly appreciated

@JimFox: I never tried importing mdl files into Blender but since there only is a Tool for exporting MDLs, this appears not to be possible, at least from what I know.

@Jetpack_Monkey: This does mean you can use tiling textures on your MDL just like in WED, only you have to create the tiling in Blender first. Don't ask me why MED hasn't this built-in as it seems to support it just fine.

PS. That so-called "Interface" also terrified me. Don't fear it, I provided many screens to help finding the right button



Edit: Almost forgot to wish you all the best and a happy new year!