I am aware that Skin making isnt easy, but you have to do some leg work yourself now and then.
you got the file
you have the code
look at the file and look at the codes inside and see if you can spot something does anything similar to the code you want to add.
then add the new code and see if something happends
it's called trial and errors and we have and still is there
This is a help forum and you get help, but that does not mean thats we do the things for you or make a step by step guide
so please try yourself, else you'll never learn and will always be in the hopes that someone has time and or petience to help you/make it for you
This is not an attack on you, this goes for everyone