How do you reduce the picture size to be within the limits?
You don't necessarily have to resize your pictures prior to uploading them to photobucket or some other site. There is another way, just using the capabilities of this site's software, if you wish to go to the trouble. When you create the entry for your picture, you can specify the size as follows (Note, to make the entries appear as text I have replaced the first and last brackets with quotation marks. For the pictures to actually appear, you would replace the opening and closing quotation marks with brackets).
Here's a picture:
If you right-click on that picture and select properties, you'll see that it is 676 x 507 pixels, width being listed first, height second. Here's the entry I used for that picture:
"IMG]http://tiny.cc/QPEd7[/IMG"
If I wanted to make that picture smaller, I would add specific width and height definitions, also in pixels as follows:
"IMG width=338 height=253]http://tiny.cc/QPEd7[/IMG"
Note that the numbers I used were half the previous dimensions (although I had to fudge on one of the numbers because half of 507 is 253.5, and the software won't allow you to use decimals). This will give you this picture:
You have to use percentages of the original picture dimensions, otherwise your pics will be strangely stretched. I hope that this all makes some sense. Let me know if it doesn't.