Front cover: use iTunes print CD insert functionality
Back cover: use MACCC + cdlabelgen
MACCC does not work under OSX 10.8 or Linux (no GUI), so you need to use Windows.
NB: Use it fullscreen or tables remain empty (don't know why).
The options to be selected are as follows:
Then you can use the txt output file into cdlabelgen, as shown below:
And the PS output file can directly be printed on OSX.