netinst + wifi = catch22

I've been experimenting with installing Debian on a laptop dedicated to experimentation.
The results have been satisfactory enough that when I discovered it had a very dead battery, I took my general usage laptop to library (only dial-up available at home). I've run the live-CD on this machine so I was expecting no problem. Evidently netinst does not recognize my WiFi hardware. It runs fine on WinXP and I believe I've connected via WiFi with one of the collection of live cd's (a Puppy linux IIRC).

Questions:
1. What is command to identify the WiFi hardware?
2. Once I've identified the required driver, how do I install it when I can not connect to the internet in first place ;<

This machine is an IBM Thinkpad T43 (lenovo)
The machine with no problem connecting is a Lenovo Thinkpad R61 (no IBM logo)

TIA



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