I think most of the setting are pretty simple to understand.
Important is that you get the overall picture of the frodo-skinning.
Take an empty workspace in Photoshop (800*600)
This worksapce is 100% width and 100 height.
All the setting you want to use in your skin are set in percentage ( <- what's the word for it???)
In the beginning make a nice skin without wondering making the ini.
Say you got this:
In your example:
LABEL_VOLUME = displays the volume level.
my label volume is "20,70%"
You got a GREAT tool in photoshop to do this.. you only have to type it in to your .ini file.
Make sure you got the rulers on.
press CTRL + R
right mouse on your ruler and choose percent
press F8 to get the info window.
When you make a rectangle you can see the coordinates in the info screen...
hopefully this screen will help..