How to change the pictures at the top 3 frame?

1. Go to http://www.tanchan-cpa.com/admin/build/block/configure/block/3
2. Before you change anything, Click the Switch to Plain Text at the Block Body. Copy the whole body and paste to your local pc text editor and save it, this way you backup the current content of this block.
3. Understand the following code for the top 3 pictures:

<TD width=300><A onmouseover="roll_over('but1', '/paper.jpg')" onmouseout="roll_over('but1', '/rw.jpg')" href="http://www.tanchan-cpa.com/mcst.html"><img title=MCST height=184 alt=MCST src="http://www.tanchan-cpa.com/rw.jpg" width=280 border=0 name=but1 _width="280" _height="184" /> </A></TD>
<TD width=300><A onmouseover="roll_over('but2', '/rw22.jpg')" onmouseout="roll_over('but2', '/rw2.jpg')" href="http://www.tanchan-cpa.com/auditing-241.html"><img alt=Auditing src="http://www.tanchan-cpa.com/rw2.jpg" border=0 name=but2 /> </A></TD>
<TD width=300><A onmouseover="roll_over('but3', '/rw33.jpg')" onmouseout="roll_over('but3', '/rw3.jpg')" href="http://www.tanchan-cpa.com/taxation.html"><img alt=Taxation src="http://www.tanchan-cpa.com/rw3.jpg" border=0 name=but3 /> </A></TD>

The but1 is for the left pictures, the but2 is for the middle picture, but3 is for the right picture.
rw.jpg, rw2.jpg, rw3.jpg are the displaying pictures
paper.jpg, rw22.jpg, rw33.jpg are the bottom pictures when the mouse over it.
You can upload your own pictures to the root of the site and replace the names of the pictures to your own. Don't overwrite the picture names for recovering purpose.