There was another thread the other day on setting a static IP address and the fellow asked for a program to do that. I wrote a Java program (because that's what I know) to set the parameters from a GUI. I've expanded the program a little and posted the source and a compiled JAR file to my website. If you try it and like it, or not, or if you find a bug, please let me know.
http://knutejohnson.com/ipconfig
Thanks