here is a thread that has some code that should help you - it may not be the same display or the same chip but the concept should help. I2C driver for New Haven LCD display - #31 by Brett oh wait, seems we’ve been here, done this… dig out your old code…
But if you want yet another example, Dealextreme LCD i2c 20*4 - #5 by mikep really isn’t the same display but can help you structure code sensibly.
Why not pick a problem and keep your discussion ordered and in that thread?