Hi,
These are demo projects located <CWInstallDir>\MCU\CodeWarrior_Examples\Processor_Expert that should help you.
See the articleWhere can I find Processor Expert examples and tutorials in CodeWarrior? describing how to open these examples.
For ADC, there is CodeWarrior_Examples\Processor_Expert\TWR-K20D72M\DAC_ADC project, for CodeWarrior_Examples\Processor_Expert\TWR-K20D72M\I2C (master only). Each project has a basic description in readme.txt in Documentation folder.
Best regards
Petr Hradsky
Processor Expert Support Team