sim city 4 copy protection type?

[Spiffy]

what type of copy protection does Sim City 4 use?

and can I use CloneCD to make a backup? what settings do I use?

I hate playing with original cd's, they always get scratched up from laying on my desk... I know, I know, straight from the tray to the case, but hey, I'm lazy like that... that's what backups are for, right?