Look at the screen and make a guess of what is discovered.
EDIT:
Here's the instructions!
#1: If you go into /usr/SYSqtapp/xe/flows, you'll see plenty of folders there. They are all flow apps. You can create your own too! Flow is made up of: CSS, SVG, XML, JS. As of now, we don't know the limit we can push it to. However, seeing the apps in that folder, we can deduce that Flowplayer/Faultline is just a flash or maybe svg UI for creating Navigation menu. To run other flow apps, run them using the faultline script. E.g.
/usr/SYSqtapp/xe/faultline view:flows/contacts/Contacts.xml
If we overclock our phone a little, Faultline should run good.
#2: Because of our Main Menu is a made up of this CSS, SVG, XML & JS... our Main Menu is extremely customizable! One example is, we can change our sub-menu view into a list with icons. Edit the flows/mainmenu/MainmenuFolder.xml and find class='MainmenuFolder', change it to class='listclass'. There you go, a list view.
But that's not all of it. If you look into resource\skins\default\mainmenu\mainmenu.css, you'll find the reference to listclass. It's actually a CSS(with a weird syntax) and it reference a SVG file. So in theory, if we modify the SVG file creatively, you can get various designs.
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SVG & CSS: Gives the design
XML (VIEWS): Construct UI (Using SVG & CSS, SoftKeys etc.)
JS: Controls the UI (Events, Change view etc.)
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Having discovered this, I hope we will have someone researching more on this because I don't really have time to. Hehs.
Imagine having a totally different phone menu design.