Unfortunately, I can't find a keyboard or function key driver for this laptop. I had one working on for a friend (downgrade from VISTA as well) and I managed to get ALL the drivers for this online. Took some time, and they're somewhat scattered. Will upload the drivers for you to get. It would be nice if someone could host or upload them somewhere that they wont get deleted or whatnot. That would make it easier for others to find the drivers for this model.
As soon as the file is uploaded I will post the link. If anyone wants to reach me, please PM or mail me. I really just joined to share my info about that model laptop.
SONY has no alternate drivers for any of the hardware for this model. Unlike others on the site, there is no section for XP/Vista drivers. They only have Vista drivers listed. What would be good is if someone found a way around the installer. I have found the same driver for different model laptops on the SONY website. The problem is that the installer detects your machine type, and if it's not the same as the one you downloaded, it will not install. Unfortunately, I haven't found a way to extract the setup files from the SFX EXE package that SONY has. If anyone figures this out, please let me know - as it may assist in getting all the original SONY drivers (for a different model) to work on this model (or another for someone with a similar problem).
*EDIT*
Something that may work for some of the function keys is to install the
MICROSOFT KEYBOARD DRIVER and using that instead. Use the MULTIMEDIA KEYBOARD and it should install drivers for the multimedia keys. The function keys I'm not sure about.
*EDIT*
My deepest and sincerest apologies. I totally forgot about the post I made. I'm currently uploading the file. If I don't post it I'll ask someone else to do so.
*EDIT*
Link is here ->
Sendspace Link
Again, my deepest apologies for not posting it sooner. Hope you found it helpful.
PeAcE.