How to open an Acroform in iText?

I modified a client's Acroform in Acrobat Pro 9, and now the client says he can't open it in iText. I had never even heard of iText before this. It's been a while since I did any Java coding, and I don't have a lot of experience with it anyway. So I am lost as to how to start. I downloaded iText and have it in C:\ProgramFiles\java\iText\iText_5.0.0.jar. All I want to do, initially, is try to open my PDF in iText, and I can't figure out how to bring up iText.

Any direction you can give me would be greatly appreciated.