Thanx a lot !!
Gonna try this tommorow and if something is wrong i will post here again
For your muzzle problem I will explain every step , i don'T know what you did in details)
-in photoshop you need to add a Alpha channel, paint white for solid and black for transparent
-in RenX material editor , you need to create a new material
add your texture and in the shader Tab , choose in the Blend selection rectangle , Alpha blend.
it should be working. If it's flashing maybe one of your animation don'T have the texture alpha blend applied.
hope it help !