Are Mac OS X 10.5.8's iLife programs safe to use in Mac OS X 10.8.x?

Hi.

Someone told me that Mac OS X 10.7.x and 10.8.x do not come with iLife like the older Mac OS X versions (e.g., 10.5.x). I did not know this! Since my client uses iPhoto that came preinstalled on his old 2008 MacBook Pro's Mac OS X 10.5.x (10.5.8 right now), can he use the old one from 10.5.8? Or will he need a third party replacement (needs to import/copy the old image files) or buy a new iPhoto version for his photo(graph)s? I recalled he did not like iPhoto and wonder if the new one is any better.

Thank you in advance. 🙂