I installed the deluxe version of Ptunes last night(couldn't get built in Rom version to let me enter my deluxe registration code). I also ran the installer on my desktop. I had to retransfer my tracks but otherwise everything is working fine. Desktop Yahoo Music Engine detects 700P just as it did my 650. Just FYI for those of you planning to use the 700P as an mp3(actually wma in this case) player.