iTunes Purchases and Digital Booklet

Hi all,

I have this "problem" when I buy a CD that include a Digital Booklet in PDF

The first time I try to double click on a Digital Booklet after I have restarted my PC, instead of opening it...iTunes play the first song that comes in alphabetic order after the word "Digital" (see pic below)

So I have to stop the song....double click the Digital Booklet again...and it opens right in Preview.

It works fine since I reboot PC again

I have understand what is the problem:

if I look the Digital Book properties (CMD+i) and look at OPTION tab, it says that the MEDIA TYPE is MUSIC and there's no way to change it.

This is an extract of my music library.

The first time, only after a PC reboot, a try to double click a Booklet....it starts playing Dildo (Interdrive Mix)....because it is the first available regular song in my library

Is there a way to change Media Type of the file other then Music?

Or maybe Apple can do that?

Thanks for your help.