90 or 99 is not a standard size for a cd even 80 mins. (all info read on this forum)
So yes you do have to overburn, you can slect a limit in prefrence in nero, and i have only seen nero to allow this feature.
I just got a 730 mg cd from my friend and i did the over burn test with nero cd speed 2000 and I got 83 mins and 732.
So it proves the fact that you cant have a 80 minute audio and 730 data. But most cd players might not go up 80 mins so might couse problems etc etc.
You get the picture I hope. I will try to burn something at 730 data cd and i will know then.
Lite on seems to be a good writer but the company support sucks.