... and remember to close everything down when burning the disk. And I mean everything! even the virus checker. Last thing you want is that waking up half way through the burn, making the PC think about something else. Just make sure you're not connected to the 'net when you turn off the checker though.
Also, when you have answered Marc's questions (or at leats have the answers to hand) then chek on the manufacturere's webs site for your burner that the blanks discs you are using are compatible.
In the meantime, do your testing (until it all starts to work properly) with a rewritable blank disk. It'll save you loads of money, unless you need a new set of coasters