I'm trying to make my own ringtones for my iPhone. I found the following page in a google search. http://www.ehow.com/how_2160460_custom-iphone-ringtones-free.html I followed the steps just fine until it says to rename the file. From what I gather, renaming it is supposed to change it's file type from. .m4a to a .m4r. However, when I rename it, it only adds .m4r to the name of the file and doesn't actually change it. That leaves me stuck. How does one go about changing a file type when a name change doesn't work. I am on Windows XP if that makes a difference.