It is as simple as adding the attached images to the folder of the skin you are using and the below text to the main.xml file in that skin's folder.
My images are completely transparent (no border or glow regardless of background color)
<BORDER>
<Entry Name="GlowShadow" Bitmap="Border_GlowShadow.png" Rows="5,?-Flex,9" Columns="7,?-Flex,7" Cells="B2-Skip">
<Data InternalMarginLeft="5" InternalMarginTop="3" InternalMarginRight="5" InternalMarginBottom="7"></Data>
</Entry>
<Entry Name="DropShadow" Bitmap="Border_DropShadow.png" Rows="3,?-Flex,7" Columns="5,?-Flex,5" Cells="B2-Skip">
<Data InternalMarginLeft="5" InternalMarginTop="3" InternalMarginRight="5" InternalMarginBottom="7"></Data>
</Entry>
<Entry Name="Frame" Bitmap="Border_Frame.png" Rows="7,?-Flex,11" Columns="9,?-Flex,9" Cells="B2-Skip">
<Data InternalMarginLeft="9" InternalMarginTop="7" InternalMarginRight="9" InternalMarginBottom="11"></Data>
</Entry>
</BORDER>