Y blockhead,
The easiest way to size the picture is to use a program such as photorazor to make it smaller.
You can then store the picture in your photobucket account and it looks like you know how to do the rest.
Photorazor is easy to use. Several people on this site use it, including myself. Oh, and it's free. Just google it.
There are other methods which can make it appear smaller but doesn't actually reduce the size.
Lawrenceville, GA