Didn't your external burner come with burning software? You might want to buy Roxio's Toast Lite (or try finding it via LW) since it's a nice app to have. It shoud be quite cheap too (I figure about 20 bucks or sumthin')

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-