Hi please be aware that the application note is old and I believe was written in CodeWarrior 6.1 that is no longer supported, anyway but you can download from the following link:
AN3927SW
regarding to the sample code, you can use the code that is installed with CodeWarrior normally are on the following folder
C:\Freescale\CW MCU v11.1\MCU\CodeWarrior_Examples\ColdFire_Examples\mcf51jm64_demo
I hope this will help
regards