"I just wanted to post that too, I tried it and get a "bad MDL" message. So what can I do?"
"Anyone any other idea about importing models to A6.1?"
Okey, to make my suggestion more clear:
"If you don't need the bones, then you can"
export your model in blender to mdl7,
load it into the free version of MED,
and then
"save your model as MDL5."
because
"That's the old format which is"
working within
"the older and newer versions of the engine."
(Maybe, I'm wrong, because I didn't test it. But, did you try that?)