I once wrote a glowing 5 paragraph series of comments on the official Currys website regarding these cover songs. Spam filtration (whether automatic or done by your site's administrator, I don't know) prevented their posting. I mentioned having sent these converted audio files as "digital stocking stuffers" to my internet friends, Gus Amador being notable among them. If you're interested in having these and would like to save yourself the trouble of doing it yourself, I will email them to you.
Were you astute enough to notice the Smashing Pumpkins Easter egg?