How do I make a cute forum signature with sprites??

[darkasaurus]

I've seen all of the super cute town forum signatures and I really want to make one but I dont know how

Can anyone who has one please explain it to me? :3

 

[FancyThat]

I was lazy with my current signatures and paid someone to make them for me but I've made my own before. You need a photo editing program like photoshop, a background image (one in the public domain) like these http://pixelplushie.tumblr.com/post/11496555364/pixel-scenes-for-everyone-xd
or a photo you've taken, a in game screen shot like my cycle town pic of pikachu etc.
You can find the Sprite master post here http://welcometoathena.tumblr.com/post/54852487291/animal-crossing-sprites-masterpost those are free to use.