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My New Toy Is... a Processor Simulator

I'd like to show you two screenshots. Take a look at them and compare them (click to open maximized):

Original application

Ported to NetBeans platform

What I did is that I took the original application for simulation of processor and rewrote the GUI part in 2 days to work above NetBeans. I'm not done with it yet but the basic functionality is there. My impression is that the application got a really great look and somehow became professional-looking. The strange thing is that I didn't rewrite any of the components - the processor components are the same. I just reused NetBeans' components like editor, menu, toolbar and output window.

That were the changes in it's UI, but the more interesting part is which features I got for free from NetBeans, which the original application didn't have:

Editor with search & replace, undo, redo, go to line, support for abbreviations and macros.
Setting of keyboard shortcuts.
Possibility to move windows, dock them, maximize editor and sliding windows.
Automatic management of options in userdir.
Customizable toolbars.
Printing of source code.
Output window with possibility of many windows opened, cleaning of output window, search, saving of output.
Improved modularity of system, possibility to add additional features as modules, their uninstalling, updating and management of versions and dependencies.
Availability of help window.
Splashscreen, support for various look & feels, drag&drop functionality...

Now I have a question - do you know about an easier way of adding so many features in 2 days?! :-)

Ok, this is getting quite a marketing mambo-jumbo, I should not forget that I am an engineer... there are also some drawbacks:

Increased start-up time (approx. 10 secs).
Increased application size (+approx. 12 MB).
Increased memory footprint (+approx. 10 MB).

However these drawbacks IMO are small compared to the set of functionality I gained for free. Programmer time is very expensive... and I wonder how many man-months it would take me to develop all the features I leveraged from NetBeans platform.

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