Hmmm,,, seems to me that you missed a NUMBER of steps,, on researching the product,, Sony outlines it quite clearly that this is NOT a simple "just run the modem driver install"
I got this from the SONY site,,
When installing Windows XP, it is strongly recommended to do so in the following order:
1. (BEFORE)Before installing Windows XP, download the Modem Driver, install the BIOS Update and run the Sony System Preparation Utility.
2. Perform a "Upgrade Install" of Microsoft Windows XP Home.
3. Install the Device Driver Updates.
4. Install the Sony Software Libraries.
5. Install the Sony Applications and Utilities.
6. Install the Other Update Utilities.
(For convenience, you may wish to download all of the updates in advance and save them on the hard drive for later installation.)
Check the link,,
I dont want to sound terrible,, but the VAIO requires MORE prep work to get it to a position to run/recognize/perform with XP,,
You need to remove the XP install on that partition and then run the updates, However, you may want to ensure that the ME install that you have wont be interferred with,,,
It seems to me that the Sony is not the worthless piece of machinery that you may feel it is,, the issue here is that you have seemingly NOT followed the directions>> hence the frustration!
You can correct the issue,, it will take some time and some step by step procedures..
You CAN make it work,, just read ..