If you have a KN5000 and up, you'll find a
convert disk enclosed who take care of the
style convert for you.
There are no such programs as EMC downloadable
as freeware as far as I know about, only a
demo version.

No, you can't "just insert" a normal HD, it
would not work, unless you're a "genius" who
manage to rebuild and format the disk to work
with the KN3000.
Happy playing
GJ