[fprint] problem with multiple devices

[Flocchini]

Hi all

I downloaded and installed current fprint-related packages and seems to work. 
fprint_demo starts but I have 2 devices on my notebook

1- upek device from sony (enmebedded in my laptop, I can't deactivate it)
2- usb microsoft fingerprint reader, supported by uru4000 driver (or I hope 
so ;) )

Upek device in my sony vaio is unsupported in linux (firmware crypted related 
stuff, see http://avilella.googlepages.com/vaiosz "fingerprint sensor" 
section), I need to access the "second" device, the usb digital persona, but 
fprint demo and pam_fprint try to open the first one: how to choose wich 
driver to use?

thank you