welcome to Windrivers Juliopop

You want the 32bit version.

Unzip the files to a location you can find easily - eg. c:\broadcom
Now right click my computer, select properties, select the hardware tab at the top and click the device manager button.

You will have an unknown device or a device with a ? or a ! next to it. Double click it to open the properties window. Click on the driver tab and update driver button. Follow the wizard but tell it to include the c:\broadcom in it's search. Assuming you have the right drivers, it will install on it's own from there.