Uploading .jpg files from PCs to digital cameras

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I have a Canon G2 digital camera. I know there are a lot of photo management
programs to download from your camera to a PC, but what about the reverse -
uploading? Can I format a Compact Flash memory chip on my camera and upload
..jpg files from a "My Pictures" folder on my PC. I'd like to be able to use
the camera for slide shows on a TV.
I can't find any mention of how to do that in my Windows documentation or
any of the Canon documents. If I select .jpg files in a folder and then try
to do a "Copy these files" action, Windows XP takes away the COPY option as
soon as I select the Camera as the destination. I thought this would be
straightforward, but I guess it's not...maybe it's not even possible.
Canon gives you the naming format for files on the
card...xxxCANON/IMGxxxx.JPG, I could probably handle renaming my picture
files, but what about the process of uploading.
 
If you have a card reader on your computer that takes Compact Flash
memory cards, then you can just copy the files to the card after you
have named them properly. If not, once your camera is attached to
your computer it should show up as a removeable device on your
computer and you should be able to copy the files to the card that way
by just using Explorer. At least I would think so....
 
I use my cameras (Sony S70 and Minolta A1) as drives just like a floppy
disk. Sony uses a Memory Stick and I have a Hitachi microdrive or a CF card
in the Minolta.
All formatted by the camera. I can copy any type of files on them and open
them at will on any computer with a card reader or by connecting my camera.
No problem opening any type of file.
However, if I copy a jpg file, not original, (file name changed or edited in
software) neither camera will open them. The files are copied to the card
and I can open them with any software I want, but not to see them on the
camera LCD and obviously not capable of using the camera to display them on
TV. Same thing with Olympus (can't give you the model, tried it on a
friend's camera).
Try using an original file from your camera to copy back on a newly "in your
camera" formatted storage card. See if this works.
I have been "told" that you can copy back a jpg file with a new file name
and edited with software in a Canon camera (no model given) or a Kodak Easy
share camera (I forget the model) and the camera will read it. Being "told"
and actually "seeing it" are two different things. I am curious to know if
indeed trying to copy back an original file would work vs trying to copy
back a file with a file name different that the original name or a file
edited with software.
 
I used the "bulk renaming" utility program to rename the sorted .jpg files in
the correct Canon format. I put the CF card in an external card reader and
moved the renamed .jpg files onto the CF card. I put the CF card back in the
camera and I thought I had it solved!! The first few pictures displayed
fine..and then I started getting incompatable jpeg error messages on some of
the pictures...when I looked at which pictures would not display I realized
that those were the pictures that had originally been taken with my wife's
Olympus. There must be some information in the file that Canon does not like.
The overall file is a mixture of pictures taken with both my camera and my
wife's....I guess this a dead end now. I think it would not even recogize
some pictures originally taken on my Canon but subsequently rotated.
 
Thanks for the feedback. It looks like Canon can indeed read its own files
after some modifications (better than Sony, Minolta or Olympus will do), but
not when the file is rotated and obviously it cannot read an Olympus file.
Can you post your Canon camera model?
 
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