DVD drive should be as hard drive, plug and play. Therefore the should be no need for a driver to be uninstalled.
If your new drive comes with a cd, then you might need to install a driver, very unlikely though
in the event that a driver was for you original dvd go on my computer locate the icon for your dvd right click property, under hardware tab select your drive and at the bottom click again property on the new window you will find a driver tab which allow you to update or uninstall drivers
but all this is quite unlikely as they are all plug and play now. And in any case even if an old driver was installed, it wont interfere with the new one
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