I have bad news about Sony Clie's. Sony stopped production in North America. Read http://www.eweek.com/article2/0,1759,1605392,00.asp
Besides that, they shut off access to developer information which in my opinion was uncalled for. That's much like the child that gets upset and takes all the toys home.
Support has suffered too. You may want a PDA that is from a company that isn't leaving town.
In closing, read http://reviews.cnet.com/5208-6121-0.html?forumID=45&threadID=27291&messageID=307266 which was a repair of the MS-DOS prompt in XP. I'd help more but the error message isn't "quoted" in your post and I'd have to guess which one it was.
Help! I just bought a Sony Cle' PEG-N760C on eBay. I've tried to install the CD that came with it but I keep getting an error message
16 Bit Windows Subsystem
The system file is not suitable for running MS-DOS ans Microsoft Windows applications.
I thought maybe something was wrong with my computer but I had a friend try it on her's and it worked fine. She has Win 98, I have Win XP. Does anyone know if this installation Cd just doesn't work on WinXP? If not is there something I can download to make it work? I am a tech newbie so any help I would really appreciate!