I know you have invested in the stamp but there are easier development systems to use for microcontroler learning. I posted the link to Kronos robotics. You might look here.
http://kronosrobotics.com/Projects/A...rial%20LCD.pdf
If you notice there is a LCD function that makes using a LCD easy. They also have a dedicated chip for implementing a serial LCD.
http://kronosrobotics.com/xcart/cust...me.php?cat=287
This summer I have mentored some high school students and have found this line to be very conductive to learning. It's up to you but, I think you would be able to pick up the needed skills faster with a Kronos Dios chip and its matching work board.
http://kronosrobotics.com/xcart/cust...cat=300&page=1
The 40 pin chip.
http://kronosrobotics.com/xcart/cust...cat=248&page=1
These links are for a pic18F class chip. The added capabilities I believe justify the higher cost. They also have PIC 16 series chips that are much cheaper but more limited.
Walk before you run. Learn the basics and take small steps.