You know what a pain iTunes can be at times, especially when you are trying to convert DRM-protected WMV files in your iPod/iPhone. This shouldn’t be disallowed, especially if you have rightfully paid for the WMV files and you want to transfer DRM-protected WMV files to your iPod/iPhone so you can watch it on the go.
You can use the free version of DRM removal software, Media Converter Pro to do this, also