Please read www.nch.com.au/wavepad/faq.html:
Q. I have a large audio file that I need to split into smaller tracks and burn to CD. Can I do that with WavePad?
Yes, you can do this using the "Auto split" function under the Edit menu in WavePad.
Alternatively, you can move through the file finding the beginning and end of each item. Select the item and define it as a "region". When you copy the regions to a CD they will be copied as separate tracks. Also download Slice Audio File Splitter to compare.