[Mod] Admin Notepad

[SMFHacks]

Admin Notepad
SMF Version: 1.1

Description:Adds an textbox in the admin main page which allows administrators to leave notes.

Link to Mod

[NightBird]

I just installed this mod to 1.1.8, and it appears to be working just fine other than the button at the bottom having no text. How would I go about changing the code to specify a graphic (savenote.gif) to replace the small, empty button?