In all - you will need 8 or 9 images depending on the message in your chat window. If you are in a hurry I have created some standard blank templates. They are in .jpg format so that they may be opened in any paint program. If you would like to begin by using my templates just click on the style of choice and unzip to your icon folder. Height is up to you but the smaller the better.
All templates are the same except for the close button.
This button can be made transparent as well. However, I'm not going to go into it at this time. To add a border is simple. Change your background color on the color pallet to the color that you would like your border to be. Remember, these images will be reduced to 256 colors and some colors will not stay the same.