[all variants] How can I force a supplementary install to accomodate new hardware?

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http://ubuntuforums.org – I did a network install (from mini.iso) of 12.04 onto a thumb drive while that drive was attached to a desktop machine that had only an ethernet connection. It succeeded. I then used the thumb drive to boot a netbook that has both ethernet and wifi, and neither comes up, nor is there any network configuration widget available. When I run the net installer on the netbook it asks which interface I want, and can query my password for WiFi, so I'm pretty sure it would have correctly configured the thumb drive install to support wireless. What I want is to re-configure, or re-install, so ubuntu (Hardware)