Java Development Tools

Hi all...

My problem is this:
I need extend certain application functionality, i need add a window popup that shows a table and user can select an option and then the window popup return it to parent window...
I'm reading "Oracle Applications Framework:Developer's Guide" and some concepts I don't understand it completely....
I had tested suscessfully toolbox.jws tutorial and I've understood many concepts and i've modified links and buttons in tutorial, but I don't know: how I can upload these changes,in others words I don't know what is 1st step to start to extend certain application functionalities....

I apreciate very much someone who tell me what I need to 1st download pages to be changed, I know that I must see region and the XML file is the page module root, but I'm not able to see that information.....

So If someone could help I very pleaced...

I'm using Oracle Application 11.5.10 and jdeveloper 9.0.3(Oracle9i JDeveloper Oracle Applications Extension)
Any question, comment or advice will be helpful

.....

Cheerss Noah.