Urgent!! need to restore deleted files (EXT3)

Hi I've an old server with a single SCSI disk which a disgruntled techie has rm -Rf * from the root of the drive. The backup has been trashed too. Is there any way to restore not only the files but the directory tree? Googling I read that doing this on the ext3 FS is impossible yet I've seen various Windows based pieces of software that claim to be able to restore no idea why they run on Windows and not Linux though?! What's the chances of a resoration and is there something that I can run under Linux that will do it? Cheers Matthew