I have seen that some comments graphics site place banners and adds to your pages and then kinda "whack" the site and doesn't look pretty. This is what I do to avoid those things. It needs a little os patience but at least you'll be able to safely post those neat comment graphics.
First go to your favorite site. For this example I'll use
Glitter-Graphics. Open what ever graphic you want to use. You'll see the HTML code, it looks like this:
< a href=
http://www.glitter-messages.com>< img src=
http://dl5.glitter-graphics.net/pub/65/65305af2ly24i1d.gif width=491 height=218 border=0></a><br><a href=
http://www.glitter-works.com target=_blank>glitter-graphics.com</a>
That will make the graphic look like this:
glitter-graphics.comNotice the link to the site and if you click on the graphic will get you to that site. Other sites will have banners included. This site only place the link at the end of the graphic, so won't whack your site. Anyway, to remove those things let see the HTML code again. Basically the graphics codes are compose of 2 things, the relinking and the graphic. What is in red is the relinking component and the rest is the graphic.
< a href=http://www.glitter-messages.com>< img src=http://dl5.glitter-graphics.net/pub/65/65305af2ly24i1d.gif width=491 height=218 border=0>
</a><br>< a href=http://www.glitter-works.com target=_blank>glitter-graphics.com</a>
Just delete everything that is before and after the <img...> That's all we need for the comment.

See? Now we have the same graphic but there's no link to it or within. You can preview your graphics and comments before posting them. This way you can be sure that you eliminated the correct elements of the code.
Now let have some fun posting pretty comments!
BTW... Some people don't like graphic comments. If you're one of them please let me know privately and I won't send you graphic comments.

Hope this helps!