Hi
As long as the settings for msn chat are set to save you can recover this easily. To be honest quick search on the internet would get you this detail without spending any money. If you need help let me know.
Thanks
Phil
Some go into My Documents folder.
So you could try checking there.
Usually there is a folder called My Chat Logs stored in your Documents folder. You can open that up.
If not, search your files with the name of their MSN e-mail that they use to log in, as that is what they are saved by.