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Move the disk image to your desktop, open disk utility, drag the disk image to the pane in DU that has the hard drives, click on it, and select burn, and it will burn to the DVD in your DVD drive.
Assuming a Dual Layer drive and a DL disk…

Leopard has to be burned dual layer.
 
no DL discs, plus no burner exept on my imac 2011 ???

TDM or can i move the dmg onto the 2011 imac and burn it from there ?

but the G5 cant read DL discs plus my drive is not working
 
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