Thanks, Clay. That worked. I had found and tried dontDownloadGraphics, but
that didn't do anything (well, with respect to the folder/graphics I'm
trying to suppress). FWIW, the correct syntax is "true". Or, more
completely (but omitting the stylesheet and output params):
$myparams["dontCopyGraphics"] = "true";
compose::compose_using_xsl($doc, $myparams)
I should have bought you more drinks in Anaheim.