Hang in there. I just installed it today and it is working on my NW-S705F. Here's a walkthrough of what I did (successfully) on Win XP Pro: A. Back up anything on your player if desired (I had no reason to do so). B. Install Winamp Full v5.33 C. Extract and copy the ml_sony.dll file to the Winamp\plugins folder (there are several other .dll's there) D. Optional Step ? Reset the player as follows: 1. Turn on player and press the little reset button on the back (use a pin or other small tool). 2. Player will power off then back on. Now, using the mode button select the "Settings" Menu. 3. Navigate to "Advanced Settings", "Initialize", "Format" (OK) 4. Now your player has "NO DATA" E. With the player powered Off, connect to the USB cable - player powers up and says "USB Connect". F. Use Windows Explorer or similar program and select your player (it will have some drive letter assigned to it). Create a new folder called "OMGAUDIO". In this new folder create two more files "04CNTINF.DAT" and "nocode.txt". G. Run Winamp, Press ALT-L to display the Winamp Library. It may prompt you to find music - I don't remember how it searches/organizes your music files. Just make sure there are some songs to transfer. H. Right click on a song or album. You should see "Send To: >" and it should have a list of items. Select the "<X:>Sony Walkman" destination (where X is the drive letter assigned by Windows). Be careful NOT to select "USB Drive <X:>, which is the same drive letter. I. Now along the left panel of Winamp Library, scroll down and select the "<X:> Sony Walkman" under "Devices". J. In the bottom right pane, you'll see all of the songs you "sent" in step H, with a "+" next to each one. Now just press the "Apply" button (you'll get a APPLY MODIFICATION warning - hit OK). The files should begin transferring to your player as evidenced by the player displaying "DATA ACCESS" and flashing "Don't Disconnect" (and your Hard Drive will have activity as the files are read/wrapped/transferred). This is the only thing a bit tricky to me: There is no obvious indication on the computer that a transfer is in process, and the only indication that it is complete is when the "+" and "M" markers are cleared (also the player returns back to displaying "USB Connect"). It might be nice to have a transfer in progress message (or better yet progress bar) and a transfer complete indication. I love my player, but Sonic Stage just simply won't run on my desktop PC (where my 60 GB of mp3's reside). No matter what version I installed, it always crashed (often with that omjbox fault). So without this nifty plugin, or one of the other two workarounds (which both have issues with this player), I have no way of getting files onto my player. Thanks to the author(s) of this application - it's (so far) a godsend. Edited to add: FYI, I've been able to add files sucessfully. I just started using this app today and wanted to post a success story for any other owners of this player to know that it (ml_sony plugin) does work for NW-S705F.