Absolute URL for f.php?

We syndicate our header & footer across multiple installs. When I enable many of the features of this plugin, it replaces all of our CSS and JS links with a single call to a file that concatenates all of it. That’s fine, and to be expected. However, when it injects the links to those files into the page, it uses a relative URL to point to “f.php”.

Since we’re syndicating the header/footer across multiple installs, “f.php” doesn’t exist on all of them, so the styles and scripts that are necessary for our header/footer don’t load. Is there any way to force it to use absolute URLs to point to those resources, rather than the relative URLs? Thanks.