The way above will get you to your ultimate goal. However, I am not a huge fan of using a modified EFI boot like refit. The simplest way is to plug in an external dvd rom drive and install it from there.
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136206
This drive should do the trick and is priced at $21.
I dont want to hear about the cost savings of doing it with a modified EFI. If you spend $1100 - $1500 on a MBA, you can afford to install windows the right way.