change a nero cd-image into a dvd image?

[lizardking]

Argh another coaster, I made the image into a .gi using prassi, it went onto the dvdr ok but it wouldnt boot on the ps2, and Ive tried to put it onto a dvdr using nero but the program doesnt allow you to put a cd-image onto a dvdr.

Is there a way to extract the info, using isobuster for example, and burn that onto a dvdr so it will boot?

Thanks for the help