Instructions
Here's the Quick Scoop on how to get those iTunes beats into your Double Agent. This tutorial is for converting iTunes DRM-free songs into MP3's.

Step 1) Download & Install the free Switch Converter onto your computer (available for both Mac and PC).

Step 2) Open Switch and choose which iTunes songs you want to convert for the Double Agent by clicking Add File(s) or Add Folder.

Step 3) Plug Double Agent with SD Card into computer and turn it on

Step 4) Open Switch and select the Double Agent as your output folder at the bottom of the Switch Converter window.  Choose .mp3 as the Output Format.

Step 5) Once the files are added, you've selected the Double Agent as the Output Folder, chosen .mp3 as your Output Format, Hit the Convert Button and watch the magic!