Posting pics is pretty easy. Follow Zee's tutorial.
zerothread/254009
As far as bolt ons, an intake is a good start. It will give you a couple of HP, a nicer sound, and makes the engine bay look sweet.
AS far as chips, stick to Dorito's. The "chips" in the Nissan ECU is hard soldered, and you can't buy chipsets for it. You can have it reflashed by a reputable company like Jim Wolf Technology, or Technosquare. That will also give you a few extra ponies, but better to do that after all the mods are done.