Firstly, when using Acoustica, try making the output sound format as MP3 instead of WAV files, it will save you a lot of space.
Secondly, when burning your MP3s, try using another program to burn your compilation. I use programs such as Nero, NTI CD Maker ect. there is a whole heap of better ones out there, try and stay away from window based burning.
Thirdly, try burning at a lower speed, always helps! :iagree: