New@burning DC games.. Little help please.

Hi, im pretty new at burning DC games and need a few pointers.
For instance, I have a .cdi file and was told to burn it with Disc Juggler. Do I just load it into Disc Juggler, and start writing or what? Is this a typical ISO? What other options do I need to mess with?
Also, what other formats might DC games come in and where can I get additional help on those?
I didn't find any answers to my questions on the sites I looked through.. maybe i'm just looking in the wrong place? Any pointers?
Any help is appreciated.
thanks.

[robin.munro]

Yeah just load it in. Go for a test first, if it fails after a minute and a half or so (some do, some dont), cancel the test, use cdi2nero and burn in nero. If the test keeps going, cancel it an burn.

The error it 'buffer underrun write error'