What To Do w Driver Which is "Activated But Not Currently in Use"

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http://askubuntu.com – Ubuntu 12.04, Graphics Card: GeForce-4 MX 420, From Nvidia Website, Downloaded NVIDIA-Linux-x86-96.43.18.pkg1.run Moved it from Downloads Folder to "Nvidia Folder" I searched for "Additional Drivers" I got a response that Nvidia-(Current) was "Activated But Not Currently in Use" 6a. Did I download it incorrectly? 6b. Did I Move, Open or Install it incorrectly? 6c. Want to update driver to improve rendering 6d. Not sure what to do next (HowTos)