for anyone who wants to know how to do stuff on photoshop cs3, cs4 or cs5: click here or here.
Some gif tips:
Make sure the width is 500px.
15-20 frames is usually your best bet for a good quality gif
If you decide to make your gif black and white, you can have a few extra frames.
Along with using the black and white effect, change the levels. make the gif darker to lessen your chances of the gif being distorted when it needs to be optimized.
500x280 is the usually best size.
For bigger gifs, (500x400 or anything bigger), use anything up to 15 frames for the best quality.
Use the perceptual option when you’re saving.
If you have anything to request (a wallpaper/gif wallpaper/gif etc) just ask me and I’ll be happy to make one for you :) Note that because tumblr has a gif size limit, if you ask for a background containing a gif, I can’t post it to tumblr, but I can send it through aim or email :D