Experiment with some of the example code in the (CodeWarrior Examples) directory to get familiar with the CodeWarrior IDE. There is also a networking stack from Interniche Technologies for ColdFire that can be used to set up a networking stack for you. Type in "Interniche" into the Enter Keyword text box at the upper right of this web page. That will give you a page of links to the Interniche code and some app notes. Also, there are some people in the forum who have experience with the stack and can provide comments--both good and bad--on it.
---Tom