Embebed 8051

I have a Cyclone 2 and i want to program an 8051 microcontroller on it. I don´t have any idea of how i have to do it. I have seen something about cores but i don´t understand much because i don´t know what to do after i have the VHDL code. Please respond me to my email adress cesar.neno.tamayo@gmail.com with some instructions and i´ll be very thankfull.

I am Cuban, so forgive my english, i did the best i could. :)