It's very simple in iTunes. Open 'Preferences,' click on the 'Advanced' tab, then on the 'Importing' tab and choose WAV as the format. Close the Preferences window, select as many songs as you want to convert and choose 'Convert to WAV' from the Advanced menu.
Having said that, I think you might want to do more research on the disadvantages of WAV files compared to Apple Lossless before you go down that path.
Having said that, I think you might want to do more research on the disadvantages of WAV files compared to Apple Lossless before you go down that path.