you have to scroll down on the left side column and click on "Creative Arts". Then there are all sorts of different forums that all have siggies. Some of my favorites are Sig Party, Prints of Peace, and SimplySnagables. Then you can either type one of those names and hit search, or you can go through the list of them and find ones that interest you. When you find one, you click on "Start Reading". Usually you will have several choices. There is usually a file called snags or snagables that you can click on and copy to My Pictures. And most of them also have what they called Adopts. Those usually have a specific artist and they will make one with you name. You usually have to find out which artist does it and post a message asking them to make you one and you have to put the name of the siggie that you want and the name that you want. It usually takes a couple days. Then you left click when you get the image to make it larger and then copy it to "my pictures".
Once you get it in my pictures, you need a photobucket account or something similar to convert it to the code that you paste in the post which comes up as a siggie. Sorry I can't explain it better. I'm about going to be late for work if I don't get a move on.
Sherry