I'm working on a site where I have a Main template, and two templates that are
based on this one-- let's call'em Temp1 and temp 2. And there are several
bitmaps on the Main template that I want to have on all pages.

Here's the problem. When I preview the Main Template, the bitmaps appear fine.
And when I preview temp 1 and tempt 2, the bitmaps appear fine. But when I
preview the pages based on Temp 1 and Temp 2, the bitmaps do not appear. (A
page based on the Main template does not display the btimaps either.)

So you can see there's a problem.

The site is set up so that the pages are in the root diretcory, but the
templates and their contents are in a Template directory. Links are relative to
the site root. I've tried changing these various settings, with no luck.