XIII backup question

[t.foster73]

what with all the posts about this game and it's equivalent cracks, I'm a little confused. I am thinking of buying this game, but would like to be able to make a backup, so I would be glad if anyone that has the game could answer these questions.

1.Do the Fairlight files work? Many people say thay are incomplete.
2.Will the game install from a back up?
3.If I install from a back up, use the Fairlight files with the backup cd in the drive, will I get the 'Want the magnetic card, then buy the game' messages?

Basically what I'm saying is can you Install, play and finish the game from backups? If you can't then there's no point in making a backup is there?