Currently Being ModeratedMay 5, 2012 10:20 AM (in response to Middleborn)
Can't answer the question on adding music to a slideshow, but here is how to create/choose a new library:
Click the icon for iTunes and immediately hold down the Option button, keep holding until you get the "choose or create library" dialog.
Use the same technique to revert to your original library when ready.
tt2Various PCs, iTunes 10.6.1.7, Windows XP Pro, iPad 2,iPhone3GS,iPod Classic+Nano