Missing Drivers for Sony Vaio PCG-FR215E

Hi!

Plese forgive me for asking but I'm slowly going insane on this...
My girlfriend got an old Vaio PCG-FR215E and now I have the pleasure to make it work...
It has Windows XP Pro but two Components have no drivers.
I don't have the Recovery CDs and Sony's great support site has only the drivers for Video, Sound,etc. but not what I need.

What's missing:
PCI-Communication controller (simple?)
USB Controller

Any help or suggestion would be greatly appreciated!

Best Regards,
Steve