Restore Original applications Nokia N70

Hello,
My young sister accidently deleted one folder and some aplications that came with my N70. How can I get them back without losing everything I now have there? I don't even know what was there! I know she deleted the Office applications... But I don't know about the rest. What did she delete?
And another question: I made a backup copy of my cellphone memory to my memory card. Is it safe? I tried to backup by using the Nokia PCSuite but there's always an error coming up.

Can someone help? Please!

Sophia