If you use Internet Explorer to view your JPG images (does not have to be dialed into the Internet at the time), and you had selected "Enable Image Resizing" from the I.E. Tools, Internet Options box, then the pictures will be resized on the spot for opening and viewing purposes although not resized as JPG files. So you can keep shooting at maximum resolution.
There have even been times when I did "Print Screen" to capture a so-resized picture for non-critical uses such as when selling on eBay. Then save it using a paint program such as pbrush.exe. This is "kinda" crude since the picture saves as a BMP and has to be changed back to JPG or GIF (I have something called LVIEW to do this) before being emailed.
Digital camera hints:
Digital Camera Technicalia Made Easy