How to post big pictures on Blogger(blogspot.com)

When you upload pictures on blogger, there are only 3 size for pictures:Small Medium Large,even the large pictures on blogger the width just 400px, so how to post big pictures on blogger?

After you have upload a picture, click the “Edit html” button, you can see the codes of the image, just like
—————————the image code——————————-
<img id=”BLOGGER_PHOTO_ID_5294718008463734306″ style=”DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: hand; HEIGHT: 180px; TEXT-ALIGN: center” alt=”” src=”http://2.bp.blogspot.com/_9Zf_P9g6cuo/SXqd-eBYNiI/AAAAAAAAC0E/pvQCk0BEnR0/s400/megaplane_05.jpg” border=”0″ />
——————————-the image code—————————
Change the s400 to s1600,(or s800, the pictures in s1600 are more bigger than s800), and remove the HEIGHT and WIDTH, if you want your pictures in your post just 600px wide, just remove the HEIGHT, and change the WIDTH: 600px;
very easy, not?

then, here is an example
I want post an image: the size: 1000 X 450
After I uopalod the image, the image code is
——————————-the original image code———————-
<a href=”http://3.bp.blogspot.com/_9Zf_P9g6cuo/SXqhewUHUsI/AAAAAAAAC0M/ZkcWJrB76Sk/s1600-h/megaplane_07.jpg”><img id=”BLOGGER_PHOTO_ID_5294721861664854722″ style=”display: block; margin: 0px auto 10px; width: 400px; cursor: hand; height: 180px; text-align: center;” src=”http://3.bp.blogspot.com/_9Zf_P9g6cuo/SXqhewUHUsI/AAAAAAAAC0M/ZkcWJrB76Sk/s400/megaplane_07.jpg” border=”0″ alt=”” />
——————————-the original image code———————-

the image is to small, then I will change the code, I have change the s400 –>s1600, removed the height,
changed the width:400px –>width:1000px
—————————–the changed image code———————-
<a href=”http://3.bp.blogspot.com/_9Zf_P9g6cuo/SXqhewUHUsI/AAAAAAAAC0M/ZkcWJrB76Sk/s1600-h/megaplane_07.jpg”><img id=”BLOGGER_PHOTO_ID_5294721861664854722″ style=”display: block; margin: 0px auto 10px; width: 1000px; cursor: hand; height: text-align: center;” src=”http://3.bp.blogspot.com/_9Zf_P9g6cuo/SXqhewUHUsI/AAAAAAAAC0M/ZkcWJrB76Sk/s1600/megaplane_07.jpg” border=”0″ alt=”” />
—————————the   changed  image code———————–

so , here is the big pictues, click to see.
Notice: You’d better change the s400 to s800, some times, the s1600 have problems.