First few were easy here's the solution. Haven't got time for this so here's a dump of what I have so far.
(SPOILER ALERT)
1: Update URL to be whiterabbit
2: "TMA-2", name of monolith in 2001 A Space Odyssey
3: "palladium", convert decimals in picture to ASCII
4: change URL to /right/brain
5: Something to do with "The Usual Suspects" probably
