(my englis is bad, but I hope so, you will understand it) I have a good idea, how "the music upload to player" become easier: 1. you need copy mp3s to player with windows explorer or total commander 2. only need you run a *.bat file (the bat file will rename *.mp3 to *.oma, and make *.dat file, etc..) 3. that's all try it: run notepad: insert in it: rename "*.mp3" "*.oma" save as rename.bat if you run raname.bat, it will rename all *.mp3 to *.oma in the same directory but this bat file isn's working, because the sony's atrac3 structure is complexier. I'm not a programmer, so I can't write the good bat file Can somebody write the correct bat file, please? (somebody are know, how build the sony structure...) it is important for me.. I think this method is easy and comfortable