I never got text to work or tried very hard. The first set of c:, t:, and i: are the background, command (blank), and font (this is what I have no clue how to get to work). Try it with your file like this:
i:/path/to/background
c:
t:
i:/path/to/icon1.png
c:command
t:
Where "t" in the second set is intentionally blank.
HTH