Getting into Coolbits
Yes, it sounds absurd, but actually getting into Coolbits is harder than overclocking with Coolbits... To get to the Coolbits overclocking utility, you need to open the display properties by right clicking on your desktop. Then you will need to select the Settings tab, and click on Advanced. It should bring up a screen like this:
Once you're at this point, you will need to click on the tab that has the name of your video card. In my case, it says GeForce3 Ti200. Once you have selected your card's tab, a window like this will appear.
At this point, select the Advanced Properties tab located at the bottom of the window. Once that is selected, this window should appear:
From here, select the Clock Frequencies tab, and you can go onto the next stage.
Overclocking with Coolbits
Overclocking your video card is a lot easier than you would expect, and if you can manage the maze of tabs to get into Coolbits, then you will be able to work out what you're doing very easily. Once you have entered the Clock Settings tab of the Display Properties, all you have to do is select what frequency you want your core and memory to be running at. This is done by moving the sliding tab to the corresponding position, rather easy...
The first picture shows Coolbits with my card at its default settings, 175MHz/400MHz:
The next picture is my card running at its new standard speed of 190MHz/435MHz. This change was made by sliding the frequency bar.
The last picture is the max settings Coolbits will allow for my Ti200. While the settings of 215MHz core and 500MHz memory are far above the standard speed, it would be nice to be able to set these higher as my card does higher than this while running stable. To obtain a higher core/memory speed, I'll have to use NVmax.
As you can see, Coolbits is extremely easy to use. Once you have the desired speed, select "Test New Setting" tab, click "Apply" and if all is well, you have just overclocked your video card. Go and test these settings in a game or 3DMark and if no glitches are present, you can try higher or select "Apply these settings at restart" which will make the new speeds the default once you have restarted.