Plug-and-Play external CDROM

Hi, I have a question about what to get.

My CDROM drive broke on my iMac, and I need a Plug and Play external one, so I can use the Software Restore disk.

Any USB i would guess should be plug and play... and firewire i would hope is plug and play.

I dont think you can go wrong with a external CD drive.. just make shur you talk to a sales personal to get the info on it like plug and play and compatible to mac-ness.