How to Texture Unreal Engine .psk Models?

[Warechu]

I got Blender to work this time, and I can apply the textures, the thing is I kinda can't see them, the railgun still appears exactly the same as when it had no textures. I don't really get what I'm doing wrong, if I'm even doing anything wrong, I'm not sure if this method just flat out doesn't work, or I did something wrong. If it's not too much to ask, can you actually texture it and show me how it was textured? It's very hard to know if this method even works or not if I can never see the results.