LCD 16x2 with I2C with large characters

Hello everybody,
I would like to operate an LCD 16x2 with I2C with large characters over two lines. The contents of the characters constantly change via a variable. Does anyone have an idea how I could start here?
I am grateful for any help.

A quick Google search for "arduino 16x2 lcd" returns 241,000 results - maybe something there can help you...

Here yo go. http://forum.arduino.cc/index.php?topic=8882.0