To anyone that has trouble resizing their own pictures for posting on these forums, I found a great website that does it for you. This way, you do it online, without having to use an application. Here is an example of their first page, where all you do is upload your own pic:

They even have a little tutorial if you have trouble.
The next example is from a picture I used, to illustrate cropping to a YT required dimension of 640 X 480 pixels, (800 by 600 is also accepted):
See how easy that looks? This is great tool for folk new to uploading pictures onto the web, that are unfamiliar with how to resize them. It also allows you to shrink photos by percentage, and to add special effects. Once your picture is uploaded, it does everything for you. When complete, you just download the finished product to your desktop. Example:
The above site can be found here:
http://www.picresize.com/
Hope that helps any new comer,
Lauren