external DVD drive?

[seablue]

I hope I haven't post this here before - sorry if I have.
I want to get a new operating system on my emac. Right now it's running on OSX 10.2. I have a retail OSX 10.4 (tiger). Emac only has a CD drive.
Question.... can I use any external DVD drive or does it have to be specifically made for macs?

[mad jew]

You should be able to use an external DVD drive if it's connected via Firewire. Alternatively, you could try connecting via Target Disk Mode (http://docs.info.apple.com/article.html?artnum=58583) with another PowerPC Mac and installing from there...