where can I find the list of all of the entertainment during the two week festival... not the racing and practice times, but the music and other entertainment that goes on the two weeks?

On the front page of this website, there is a link -  Visitor Information which takes you to a new page that has all sorts of information for people who are visiting the Isle of Man, Whats On 2015 among them.

This takes you through to the Government website specifically set up to provide up to date information on whatever they are aware of, or have been made aware of, that is going on throughout the year.

A short cut to the Government website is - HERE

thanks!