Its a really long time since I've had to create one of these but what my husband wants, my husband gets. I've got a background image that is quite big and then a stack of images with a couple of words fading in and out. All up its going to have about 40 frames. Last time I did one of these I could set a background image and then add the animation frames over the top. I can't seem to find anything that does that this time around.
Mh... Why not try GIMP? Here is a tutorial http://www.gimp.org/tutorials/Simple_Animations/ Code (markup):
Its a long time since I've looked at GIMP properly. It's grown up alot! Even opened my psd source file.k thanks GMF