I suggest not using tutorials at all. All they did for me was slow me down. I suggest just exploring the pk3 file by changing .pk3 to .zip and unziping it. If you have windows XP, theres a really useful tool that allows the PC to read pk3s like zips at Pcgamemods.com. Just poke around. Try downloading a skin with bots and sounds and npc's so you can learn that stuff to. Good luck!