Direct download link:
http://www.subsim.com/radioroom/down...o=file&id=2923
And no, it doesn't go in the SH3 folder. It's an external tool that goes into Program Files (it'll put itself there during setup) and creates an icon on your desktop. It will do all the work for you. Read the User Guide and ask lots of questions here. Where Commander's concerned, I love to answer them.