Vista mangling print order for double sided printing of sc..

I have a business application which involves scanning and electronic storage
of multipage documents as jpg images of the pages. File names of each page
are of the form NAME-001.jpg, NAME-002.jpg, etc. Occasionally one of the
documents needs to be printed out and the preferred way is printing
double-sided (on a Xerox 6280 color laser printer if it makes any difference).

In XP, one merely sorted the jpgs alphabetically in Windows Explorer,
selected all the desired pages and printing them would call up the Photo
Printing Wizard with the jpgs in the order they were listed in Windows
Explorer. They could then be easily printed out double sided icorrectly.

In Vista (x64, Home Premium SP2), selecting the jpg's in the same way and
trying to print them brings up a window called "Print Pictures" which has
basically the same options as the XP Wizard, but the pictures are ordered in
what seems to be a wholly arbitrary sequence. I can seem to make the sequence
change by different ways of selecting the photos, but I can't get them into
any usable order.

How can I get them to be in alphabetical order just like XP so I can use
double sided printing?