Hi LillyBear, things might have changed since you last did one.
When you're next logged on, go to "My Fourm Settings" to the right in the lighter green header bar. Click "Edit", add your new signature to the box, then click save. If you want to add images here, you put the html code for the image in the signature box. Images have to be a certain dimension. I can't recall what that is but Binky Bunny has posted the new dimensions in the Lounge. Goodluck!