Wireless on Ubuntu 10.10 on a Macbook 4.1

[Christopher Nelson]

Hello,
I'm following the instructions on the following website for getting the wireless driver working and am fin until it gets to the 3rd install which outputs this error message
"An unhandled error occured
There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks. Please report this error at http://launchpad.net/aptdaemon/+filebug and retry."
After pressing ok the installation continues but and says that it's installed but even after a restart wireless networks are unavailbe.
Any help would be great as we're trying to role out ubuntu on some test macbooks in our school to see if we can get away from having to use microsoft os and software.
Cheers,
Chris