NTI - CD write error (Optiarc AD-7540A)

[qanda]This thread is about the Optiarc AD-7540A. Click here to see full specs[/qanda]Software -NTI CD & DVD Burner Gold (comes with Acer Laptops)
v 7.70.0908
Running Vista Home Premium

I’ve burned a bunch of CDs on this laptop already, but I’ve never tried to fill a CD to the limit.

I tried to burn a couple of Audio CDs up to the 80 min limit (79:08) but the last tracks (42-46) keep getting messed up and the burner shows an error.

How much space do I need to leave on a CD for all the extra info that gets written (CD Text, TOC)?