At the title screen, select the Convert menu. Selecting save data from .hack//Infection, Mutation or Outbreak will give you an email from BlackRose that was sent to Kite after Quarantine. Selecting .hack//Quarantine save data will give you the previous email, and an email from Hokuto(.hack//AI Buster) sent to Rena(.hack//Legend of the Twilight Bracelet). However, in the Japanese release the Hokuto/Rena email is gained from .hack//Fragment save data.
View Vol. 2 preview
At the desktop, hold R1 + R2 and quickly press Square, Triangle, Square, Triangle. Release R1 + R2, then hold L1 + L2 and quickly press Right, Up, Right, Up. Release L1 + L2, then quickly press L3 + R3. If you entered the code correctly, the Vol. 2 preview will be available in the media performer.