The bit component set is, as claimed, infinitely easier to skin than MM’s components. Just drop the skin folder into your library and skin away. There a few caveats though:

• TextInput component: The skin is misnamed in the library for some reason. Duplicate the textInputSkin movie clip and export the duplicate for actionscript with the name ‘textInputBackgroundSkin’ instead of the name ‘textInputSkin’.
• ComboBox component: It uses the BitList component, so you’ll have to skin everything in the List Skins folder as well
• Slider component: the slider button stretches to 9 pixels no matter what. If you want your slider button to be smaller, put an invisible movieclip (alpha = 0) under the actual slider with width 9, this will fool the script into thinking it’s the right width.

It can get tiresome to manually set some of the skin properties (ie: fontColor) for all components once you’ve skinned them. For this purpose I’ve updated the component properties extension so that it works for multiple components. For example, select all of the components on stage and select Commands > Import component properties. Then write fontColor in the first text input and "#ffffff" (note the quotes) in the text area. This will also work for MM’s components.

Get it here: Component properties extension v1.1