The 4.4-RC2 release is based on the Android 4.4.2 (KitKat-MR1 release) with a lot of x86 specified code to let the system runs smoothly on x86 platforms, especially for netbooks or tablets. Except the features and bugfixes since 4.4-RC1, there are more features include
We tried to create a universal image for most x86 platforms for the kitkat-x86 release. The plan is still in an experimental stage. Please report bugs to the android-x86 forum with detailed specs of your machine and error logs.
The iso file is hybrid format. That means you can dump the iso into a usb drive and get a bootable usb stick, like
dd if=android-x86-4.4-RC2.iso of=/dev/sdX
where /dev/sdX is the device name of your usb drive.
repo init -u git://git.osdn.net/gitroot/android-x86/manifest -b kitkat-x86
Read this page for how to compile source code.