Re:Urgent Help Request
I'm sure people will be more than happy to help you with specific questions.
There have already been replies on this thread with links to tutorials and sample code, including the PICDEM 2 Plus User's Guide and the sample application that contains all the source code needed to read the temperature from the TC74 using I2C and display the result on the LCD.
Have you looked through the I2c.c, Lcd.c and main.c source files? Do you have any questions about them? Have you managed to compile the sample application and run it?