1998 Mitsubishi Eclipse timing belt replacement

i am replacing the timing belt on my 98 eclipse gs-t.i have a chiltons but i am still havin a problem.i am to the point of removing the crankshaft pulley. the book isnt too clear or i am missing something. i have removed the 4 12mm bolts around the large bolt in the middle. do i have to remove the center bolt as well? if so is it reverse threaded.also i was using the center bolt to hold the crankshaft from rotating while i removed the outer 4. [img:9e1d60029d]http://www.2carpros.com/forum/automotive_pictures/551838_daddys_ride_1.jpg[/img:9e1d60029d]if i have to remove it what is the right way to keep the engine from rotating.