You could also consider the following:
Audacity can help you combine a number of tracks, it has a number of features thaat might appeal to you, and it is free - you could check it out: http://audacity.sourceforge.net/about/features
Also Kristal is quite an advanced sound mixer, with a number of available channels, is also free, you could check that out too: http://www.kreatives.org/kristal/
There are a number of free utilities that will burn to CD for you, the basic model of winamp (I think), Windows will now burn cds for you if you have a recent version of XP. I don't think that you would have a problem finding a free cd burner.
But WavePad should do all that for you. No need to go further!