Just for the right understanding:
You installed the Software. You don´t understand how to use the Timeline (or Live in general). You found this forum. Now you ask, how to start a completely different application, althoug there are hundreds of posts in this forum?
Ýou should definitly think about this idea again but back to your question:
You CAN make a little program like this and save it as a START.bat application:
start "d:/SweetLight/Live/live.exe"
start "c:/programs/apple/itunes.exe"
exit
to start the programs but i think there´s no way to start a song in iTunes AND play a lightshow in live.
- So...play a bit more with the timeline, look up in this forum and you can try the demo-show profile in settings!
Have fun with this program!
Lighter007