I bought Arts pdf aerialist from PDFStore last year and Sean Stewart from the Arts PDF Team sorted out a piece of javascipt tied to a button that did this very thing (reversed the order of the pages scanned). I've forgotten how the actual button was installed BUT it was well worth the money for PDF Aerialist for that button alone. I have made a recent posting about the HP 5590 scanner and acrobat that will explain more, if you search this forum for it.
Gerard Murphy
for (i=this.numPages-1;i>=0;i--)
this.movePage(i);
HTH, Reinhard
TOWE
Aandi Inston
Deosaran.
If you do it more often you should set up a own menuitem for it = one line more. See JS-Help, App-Object, addSubMenu. If you need help with this let me know.
HTH, Reinhard