[Cialug] File Recovery on Mac OS-X

[Claus]

I'm not a Mac guru at all but I need to help someone to recover some 
deleted files on a Mac OS-X computer.

Although the budget for this is $0 the files are important.

It looks pretty bleak to me so I could use any advice on how to approach 
this issue.

Is there any bootable CD with a file recovery tool out there (thinking 
of Knoppix)?  And how does one go about to use it?

   Claus