First playthrough of the entire series, and so far my favorite part of Assassin's Creed 2 is using the Internet to decode the coded strings in these Eye-Glyph-file-unlock things. Also: Are the
Steam Community :: Guide :: All Glyph Locations and Solutions - Assassin's Creed II
Assassin's Creed 2 - Sequence 2 - In The Beginning - YouTube
How to Walkthrough Assassin's Creed 2: Glyph Puzzle 6 « Xbox 360 :: WonderHowTo