The images should be opened and edited in a graphics program. This isn't something you do online. You add text to the image, and upload it to the images127 subdirectory. And, of course, you also change the coding from blankbutton.gif to wolfbutton.gif (or whatever).
Looks nice! But do you think perhaps white text on the buttons? Not all computers have the same settings, I suspect your screen is brighter than mine, making the black stand out more against the blue.
Was actually thinking of making the lettering on the buttons a yellow in color.
Would like to have gold but yellow is close enough.
Reason for the gold is that the cub scouts have a blue and gold banquet at the end of the school year where the higher ranking boys cross over into boy scouts and everyone else gets to move up a rank.