Hi and congrats on having a super machine! Like me you’ll probably finding using Mac so different from PCs. What’s confusing is remembering too much about PCs and assuming Macs do the same. Although different, eventually you’ll discover Macs are easier and a lot more fun and far less frustrating! For slideshows try:

http://www.dummies.com/how-to/content/how-to-create-iphoto-slideshows-on-your-mac.html
and
http://macmost.com/recording-keynote-slideshows-timed-to-music.html

I know a bit off topic, Gary, at Macmost provides some really useful vids to get you started and beyond, plus they’re FREE!!

Two others: Apples own video tutorials – the basics! http://www.apple.com/findouthow/mac/
Also, visit your local Apple Store, not only are the staff very helpful but run FREE in-strore tutorials – not bad hey!!

Hope that helps and enjoy!!

you can get a photo slideshow software for Mac from download.com.