Hello, I have a Sony Walkman A series and it has to be registered using SonicStage to a pc before use on that pc. I got a new pc Windows 7 last year and wanted to register it today, but I ran into some problems. My external hard drive, where I had saved the SonicStage program, is not working. So I tried to download SonicStage, and I can only find the updated version 4.3, which does not work with Windows 7. I find that version 3.0 will work, but I cannot seem to locate a download for it. Can you tell me where to find one? OR.... I could add new music to my Walkman if only I could convert mp3 files to Oma (Atrack). Can you please tell me where to find a conversion tool to do this task? Thank you so much for your help.