On Wed, 25 Aug 2010 10:30:41 -0700, james wrote:

After a trip I collected photos from several friends. Some of them have
the wrong file time stamp. Some also have wrong exif dates (not adjusted
for time zone). Plus, I created jpg files that are actually text
description of the location, and I want these descriptive jpg to be
displayed in the right order among the photos.

In order to view these photos on various platform (windows, iphone, ...)
in the correct chronological order, I need to be able to (1) edit the
exif dates in individual jpg file and (2) bulk copy exif dates to file
dates of a bunch (3) copy exif dates into filename. This is because many
photo viewer sorts by file name, some sorts by file dates, and a few can
sort by exif dates. I want to name the files and set the file time
stamps so that no matter which of the above fields are sorted, they
would be displayed in the right order.

Any suggestion on freeware for windows that can do the exif
manipulations?

Too bad you're not running Linux - 'jhead' is available for most
distributions and will do that and more. I've also seen notes that acdc
or aseedsee or whatever it's called may do a lot of what you want.