@tayloryang: It's explained in the sticked topic and in the first post, please read all things mentioned there carefully.
1. ....For keys and encryption related things read
this topic. All issues related to encryption, quickbms scripts or keys should be addressed to the topic with keys, such posts will be removed from this forum in most cases.
...
If you need only those assets which are supported by umodel (meshes, textures and animations for this game), you don't need to extract packages. I would also recommend to view some tutorials about general umodel usage, starting from the one from
tutorials section.