After at least a year of searching, countless e-mails to the Iditarod staff (and others) I FINALLY found some of the music that is used with the Insider videos!
The music can be found on the De Wolfe Music site. This will take you to the search page: http://www.dewolfemusic.co.uk/musicsearch/index.php
(you'll have to cut and paste it into your search box)
Two of the pieces of music are: Final Reckoning by Paul Lawler and Urgency also by Paul Lawler.
Type in the title of the song in the "track title" box and then click on the search box down below.
When the information appears on the right side, click on the "play" arrow and listen.
I'm still searching for more of the music, but at least we've got two of the songs!