The MSP430G2553 is a microcontroller.
Presumably the development board being used is the MSP430 Launchpad (MSP-EXP430G2)?
I'm afraid you haven't provided a lot of details. Instead of relying on a fairly complex demo, I suggest you pick out some key functionality (e.g. light an LED) and write a short program so you can understand the process.
There is example code provided via a link on this page which may be of use to you: http://processors.wiki.ti.com/index.php/MSP430G2_LaunchPad#General_MSP430_Software_Resources
This might be the source code for the demo you are after: http://e2e.ti.com/support/microcontrollers/msp430/f/166/t/179582.aspx