How can i write bengali in libreoffice 3.5.7.2/libreoffice 4.3.4

Sir, I am from India, I often need to write documents in bengali, so i want to know how I can do it ln libreoffice. I am new in libreoffice, before that I would use Microsoft office which would serve my purpose well. But now I want to go for opensource.

Maybe this link can give you ideas on how get Bengali running: How to type in farsi (persian)