ARM-USB-Tiny under Vista

Hello!

I bought a Olimex ARM-USB-Tiny programmer. How do I install the Windows Vista (64 bits) drivers?

I read in the FAQ:

Q: I use Windows XP x64, how I can update the USB drivers?

A: FTDI have x64 drivers on their web, download them and use our ARM-USB-TINY PID: 0x0004, VID: 0x15BA to install the drivers.

but I do not understand how this is done. I could download the drivers from FTDI, but I do not know how to modify the PID and VID.

Thanks for any help,

Paulo