Roxio Toast 10 Titanium

Hello all,
Noob here.
I recently upgraded my iPhoto, and it's burn function has changed from how it was previously to something that I am unfamiliar with. I bought Toast 10 Titanium software so I could burn/copy what I wanted.
But, now when I try and burn a mass quantity of pictures onto a data CD/DVD, it will give me an error message of how there are multiple pictures that share the same name and will not burn additional copies. The problem is that the names may be the same, but the pictures are different. I want to burn, and keep all the pictures.
What can I do in order to rectify this issue?

Thanks, in advance for all the help, guys.

Change the name of the photos. If the names are the same you can do this as an example:

Photo = "Blue Lake", "Blue Lake1", "Blue Lake2", and so on.....

What would be the easiest way to do that?
I don't see the option through iPhoto.