hi, i m a bangladeshi, now i m studying in shenyang aerospace university in china

I am planning a trip to Malaysia on jan 2013, and would like to prepare my visa as early as I could, please let me know when is the earliest I could hand in my application. What documents do I need for the application?
even i have some friends, they are Malaysian. can they help me to get it or have i need any documents from them.

thanks