Hi Sexxxy
No I do not normally apply permissions before I apply textures, even textures I have designed myself.
As to your second point I do this after I have linked prims.
If you need any further help you are welcome to IM me in world and I can help you further and point you in the direction of some great self teaching places and resources in world.
Galatea
CEO B & G Companies (incl B & G Designs)