Rotating Sprite

Question

I have a sprite on stage that I want to rotate, The sprite itself contains a shape (a triangle) with these coordinates (10,10)(10,50)(20,30).
When I rotate the sprite (as it is now) using spritename.rotate=nn, it rotates, but around the (0,0) position of the parent container (a movieclip). In an attempt to figure out what was going on, I set up some trace statements, including one to check the width and height of the sprite. It changes with each rotation.
Not sure what is going on here, or why the sprite rotates using the parent mc, but if someone could point me in the right direction, I would appreciate it.

Answer 1

use:
var sp:Sprite = new Sprite();
with(sp.graphics){
    beginFill(0xaa0000);
    moveTo(0,0);
    lineTo(0,40);
    lineTo(10,20);
    lineTo(0,0);
sp.x = -sp.width/2;
sp.y = -sp.height/2;
var p:Sprite = new Sprite();
p.addChild(sp);
p.x = 10+p.width/2;
p.y = 10+p.height/2;
addChild(p);
now p will act like your sprite with its reg point changed to the center.  just rotate and otherwise manipulate p instead of sp.