It's very easy to use: When you run it, you see a list of all drivers installed in your system. If you want to eliminate any of them, just select it and click the 'clean' button.
You have to be careful when using that option, because it can be very useful, but if you fail, it can make some devices not to work properly.
Driver Sweeper is an interesting application you have to use intelligently. If you use it properly you can save valuable space.
We recommend you to create a backup before elminating any driver.