This "compat-wireless" stuff is an alternative Linux kernel (probably filled
up with proprietary code), isn't it? You can probably start a Live system
(for instance the Trisquel Live system you have used when installing the OS),
download an image of Brigantia's kernel (here:
http://packages.trisquel.info/brigantia/linux-image-3.0.0-17-generic ),
'chroot' to the install system and install the downloaded package with 'dpkg
-i'... however you need to be motivated to learn the use of a terminal! If
so, search the web for 'chroot' and list us the exact commands you plan to
execute.
Otherwise, just reinstall. Anyway it can even be faster (assuming you have
not had enough time to customize your system with many additional
applications, etc.). Be careful with your data. If your /home is not on a
separate partition, you need to backup them (using, again, a Live system).
As for hardware requiring non-free software, the recommendation is to switch
to freedom-friendly hardware such as everything you can find on
http://libre.thinkpenguin.com
Additionally, buying devices from the URL above (notice the "libre" part that
is important) means donating to the Trisquel project 25% of the profits made
on your purchase.
