Everything looks good except for that breather you stuck on the valve cover. I know you're trying to keep oil out of the intake, but this is a closed fuel injected system calibrated by the MAF. That little line from the valve cover tapped into the intake AFTER the MAF sensor, so by sticking a breather on there you essentially opened up the system. I'm not saying it's a big deal or anything, but I wouldn't do it. Well, actually, I've done it and reversed on my last car.
If you're really concerned about sucking in oil, then rig up a couple oil catch cans. You can stick one on that line, and put one on the line from the PCV valve to the IM.
Here's some pics from another member, his name is Kamski. And I think the prices on the receipt are in canadian dollars, so it should be a little cheaper for us.
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2002 Altima 3.5 SE auto
14.5@95, 2.28 60' (at Moroslow)
Find out more about Moroslow here
Under the Hood:
AEM CAI, HotShot headers, Magnaflow catback (crush bends ftw), A/T drop resistor mod