Taking apart Star Wars Figs?

I want to do a custom with the head from a star wars fig...how the hell do I get the thing apart?

[The Spectre]

Boil and pop method

Boil some water, submerge the figure for a minute or so, pull the head out slowly and pulling in one direction so as not to tear the post underneath.

Here's a bit more detailed guide, but yeah, that's basically it.

http://www.ffurg.com/basics/disassembling_figures.htm

Much obliged, just popped a couple of em' apart. thanks man.