It is possible to start a new game at a higher level then normal if you have a '.Hack//G.U Vol.2//Reminisce' clear file on your save card. Only Haseo is available with this starting bonus and he will start at level 35 with ALL the equipment from that level.

At the desktop, hold down R1 + R2 and press Square, Triangle, Square, Triangle. Now release R1 + R2, then hold L1 + L2 down and press Right, Up, Right, Up. Release L1 + L2, then hold down L3 + R3. All of this has to be done quite quickly, if you have succeeded in entering the code correctly you'll find the preview if you go to the media performer.

If you are stuck by the L3 and R3 bit, well it's actually the left and right analog sticks, just press down on those when you get to that part of the code.

Alternatively, if you can't get the code to work, complete the game once and you should be able to see the preview anyway.