Hello i hope you can help me on this, here is what happend.

A Friend of mine went to london visiting and toke some photos, and burned a CD of photos with nero,don't know the version.

when i arrived home, he wanted to burn some more photos on the same cd, when i press the button to burn the Nero warnd this:

"The Disc introduced is not empty, but the burning mode is "start-Multisession" or with "no multisession".
This way you can't access the informations already burned on the cd trought the windows explorer, do you wish that nero carry on with the burning.
My friend answerd "yes".

As nero told him, i can't access the information that he already burned on the cd, in this case, the photos he toke when visitin London. It only shows up the recent photos he burned.
Is there a way that i can access those photos he toke in London?
Thanks for all the help.
My Best Regards