I did not create this guide, I am quoting Michael37 from the Ubuntu Utah Ubuntu Forums.

1. Enable fgrlx driver.Install linux-restricted-modules and restricted-manager provied in the restricted repositories:
   Code:

   sudo apt-get update
   sudo apt-get install linux-restricted-modules-generic restricted-manager

   Open the restricted drivers manager in “System -> Administration -> Restricted Drivers Manager” and select “ATI accelerated graphics driver”.

2. Install xserver-xgl package
   Code:

   sudo apt-get install xserver-xgl

3. Install compiz
   Code:

   sudo apt-get install compizconfig-settings-manager compiz compiz-core compiz-fusion-plugins-main compiz-fusion-plugins-extra compiz-gnome compiz-plugins libcompizconfig-backend-gconf libcompizconfig0

4. Reboot
5. Log in. 3D effects should be enabled!
6. Customize Compiz Fusion.
   Select System → Preferences → Advanced Desktop Effects Settings
   In the new window, General Options → Desktop Size → Horizontal Virtual Size. Set it to 4.
   The other two options have to be left at 1.

   Continue customization per Forlong’s guide at http://forlong.blogage.de/article/20…-Compiz-Fusion

via Ubuntu Utah Ubuntu Forums and Forlong’s Blog

Step 1: All BCM43xx – Install NDISWrapper and Blacklist Native Driver

echo 'blacklist bcm43xx' | sudo tee -a /etc/modprobe.d/blacklist
sudo apt-get install ndiswrapper-utils-1.9
mkdir ~/bcm43xx; cd ~/bcm43xx

Step 2: Download and Extract Drivers

sudo apt-get install cabextract
wget ftp://ftp.compaq.com/pub/softpaq/sp34001-34500/sp34152.exe
cabextract sp34152.exe

Step 3: All BCM43xx – Configure NDISWrapper (and WPA Supplicant)

sudo ndiswrapper -i bcmwl5.inf
ndiswrapper -l
sudo depmod -a
sudo modprobe ndiswrapper
sudo cp /etc/network/interfaces /etc/network/interfaces.orig
echo -e 'auto lo\niface lo inet loopback\n' | sudo tee /etc/network/interfaces
sudo ndiswrapper -m
echo 'ndiswrapper' | sudo tee -a /etc/modules
echo 'ENABLED=0' | sudo tee -a /etc/default/wpasupplicant

Step 4: REBOOT

After your laptop is all booted up you should now be able to find wireless networks in Ubuntu 7.10, and connect to them.

If you would like, you can now cleanup unneeded files:

rm -Rf ~/bcm43xx

via Ubuntu Documentation