Calisurf,
This is what I do to resize pictures, before uploading them:
Install
Picasa which is a
google image editing product. Great for many other features.
Anyways, you can download it here:
http://picasa.google.com/
Once installed, you can view all your pictures with it.
Selecting a picture will automatically open it and give you a panel of tools (very intuitive) on the left side.
If you don't need to edit your image go straight to the "
export" button located at the bottom center of the page.
You will see something like this:
Follow the directions above to create an image that is exportable.
Drop me a note if you need further explanations.