How to optimize disk space for recording to CD
For best performance when burning data to a CD or DVD, you should configure your computer to use a drive other than the one on which Windows is installed for temporary storage of the files during the write process. This requires that you have multiple disks or partitions available on the computer. Here's how to select a different drive or partition on which to store the temp files:

Click Start | My Computer.
Right click the drive icon that represents the CD recording device.
Click Properties.
Click the Recording tab.
In the drop down box, select a drive that has at least 700 MB of free space.
Click Apply and OK.