the tan navbar
needs to change in the file style.css to
#navbar {background: #ff0000;border-bottom: 1px solid #aca899;padding-top: 2px;padding-bottom: 2px;padding-left: 5px;cursor: default;}
from
#navbar {background: #ece9d8;border-bottom: 1px solid #aca899;padding-top: 2px;padding-bottom: 2px;padding-left: 5px;cursor: default;}
the background: #ff0000 is the red bit ffat the start being full on red
if this - http://www.transfigurationchurch.org/cms/modules/agendax/images/headbackground.gif - is your background image then its in a strange place - you might want to make it more local to the theme. and you also don't have it doing any repeats x or y
in the bit of code just after your body tag you seem to have fixed those dimensions for the image into the code
eg
you may want to remove the width and height completely and then make sure the table cell it is in is big (high) enough to hold the image
that should just about do it i think
hope that helps
hal9000