USB Serial Devices and Speakup

[Zachary]

Hi,
I've given up with the keypad on my desktop, and anyway my laptop has got a 
hard drive to spare.
I'm wondering how Speakup will recognize a Dectalk Express connected via a 
USB serial adapter?  My laptop doesn't have any built in serial ports, and 
so I have to use an adapter.
Do I have to supply extra Kernel options to get it to boot?  If not, how can 
I start speech after the Kernel has detected the USB device?  Assuming, of 
course, that it supports it.
Thanks,
Zack