This system is called "Burglish" = Burmese + English.
Original Source: http://burglish.my-mm.org/latest/trunk/web/testarea.htm
It can convert your Burglish typing to proper Myanmar letters.
Just type Burglish in the blow given box, choose the correct Myanmar letters, then, copy and paste anywhere you want. Since I am not good in typing Myanmar letters, I am using this system whenever I have to post something in Myanmar letters at my sites. Enjoy!