Download DragonFace latest version v.2.1.2r1
Dragonface is a very intuitive piece of software that will let you edit and modify A10, A13 and A31 firmware images. You can quickly change your boot logo or animation; of course, you can do much more, pull, push and edit Init.rc or Script.fex, remove and add APK's, change basic info.
Download DragonFace v.2.1.2r1 from here, here or here. This version seems to be capable of handling certain A20 firmware which other versions can not modify. You can find the previous version v.2.1.2 in this article.
