The LCD display comes in 2 sizes and with or without an i2c adapter.  Make sure you get the one with the i2c adapter pcf8574t as it saves a lot of time and all of these instructions are geared towards the adapter.  The size doesn't matter a whole lot, but I typically only use the 2 lines by 16 characters (LCD1602).  The other size has 4 lines and 20 characters across (LCD2004). 

Basic Instructions:

1. Hardware:

   • LCD1602 with adapter [click here]

   • TXS0108e [click here]

2. Datasheets:

   • LCD1602 [click here]

   • pcf8574 [click here]

   • TXS0108 [click here]

3. Schematic: [click here]

4. Software: [click here]
   Note that the utility does not control the OE pin on the txs0108e, so you'll need to set that pin high manually before running the program.