Is it possible to get a regular DVD player and plug it into a Firewire case, and have a Mac play movies on it? I know you can do this with prebuilt Firewire DVD-RW drives, but I want just a plain IDE DVD drive, since I'm cheap and don't want to spend $900 on something I'll never use. :)

If anybody could help me with this, I'd appreciate it. I want to be able to watch movies on my CD-ROM iBook. (I don't have a choice but CD-ROM, since it's used.)