Well, this it's well PAST time for you to learn how to do it yourself!
:-P

There won't be a LINE out on your MD recorder...   What you want is the head-phone jack... that goes to the LINE IN on your PC (Proabably at the back which is a DUMB design)

Sonic Stage, Simple Burner are NOT the kind of software you want for this... (Unless you have an HD MD recorder... But the software to 'check in' live recordings isn't out yet, I don't think)

ALL the info you'll ever want/need is here
http://www.minidisc.org/

:-)