when you downloaded it was downloaded as a .zip extension when you click to open, it should show on the left to extract all files, xp will then extract the .zip and the file will be able to run after you click on the .exe file
you will not need to worry about dss etc... just install the chipset driver first and then any others but this is only after a fresh install, not for a system that is already up, you will not need any drivers unless you show any yellow exclamation points in device manager (start, right click on My Computer/ choose manage, then choose device manager from the left hand panel)