These are buttons, find the buttons and replace here the textures:
back="L2UI_ch3.Btn1_normalOn" fore="L2UI_ch3.Btn1_normal"
there's have to be a button named *over, server automatically sends it.
Btn1_normal (it's the default button):
Btn1_normalOn (when you click it) :
btn1_normal_over (aka hover, when you just have your cursor on it)
so you gotta find the buttons from GOD and parse to H5. GL
Some of the buttons you need:
.TGA FORMAT
http://www92.zippyshare.com/v/EZv3QZJX/file.html