1. To make an installable USB drive and make the Macbook support booting from USB drive, read http://howto.cnet.com/8301-11310_39-20020513-285/install-win-7-on-macbook-air-from-a-usb-drive/ until "C. Installing Windows on MacBook Air from the USB thumb drive.".
2. Download the macbook drivers for windows from your Macbook by finding Boot Camp Assistant at the utilities folder, and choosing "Download the latest Windows support software from Apple", it's 700MB. Copy them into a USB drive (if you don't have enough space on the first USB drive, copy them into a new one).
3. Partition your hard drive by typing:
sudo diskutil resizevolume /dev/disk0s2 31G MS-DOS "MS-DOS" 1G
at the terminal, change 31G to your desired size of the OS X's partition and allow the rest to be allocated for Windows (1G will be changed automatically to the maximum allowed size). Terminal can be found at the utilities folder.
4. Shut down your OS X and start your Macbook again, hold down the "alt" key, boot into your USB drive and install Windows. The installation takes 7 minutes.
5. Once done install Boot Camp drivers from step 2 on Windows.
That's it! You have a working dual boot system with working drivers. Enjoy.
See also welcome page - what is this blog about.