I just got the 4s and I have been trying SO HARD to figure out how to make a voice memo a ringtone...online I've seen how to do it, I've gotten to like the middle step of the process, and then I can't complete it somehow. I can't get the file right or I can't figure out where there finding buttons or files or whatever. So could someone please help me?! I'm so tied of the default and other provided ringtones! I have a Mac computer if that helps...thank you so much!