I have a PCV-MX20 and I have installed Sonic Stage 2.3 on it. The install left Sonic Stage 1.1 on it as well (and the FM, memory stick & aux recording works as before). I have two problems: (1) Recording MDs using either 2.3 or 1.1 freezes at 95%. Before installing 2.3 that didn't happen with 1.1. (2) Sonic Stage 1.1 plays MDs OK. Sonic Stage 2.3 "plays" the MD, but there is no sound. I think I need an upgraded netmd driver or maybe a firmware update for the MD in the PCV-MXS20. I have two MZ-N707 portables, and Sonic Stage 2.3 works beautifully with them (connecting via USB to my Toshiba notebook). If anyone out there actually gets Sonicstage 2.3 to work on the Vaio PCV-MXS10 or S20, please tell how you did it. Thanks, Fred