How can I get my hair to STAY super straight??

I use the babyliss pro straightener, and its good, it goes up to 205 celsious. I use a spary that protects my hair from the heat, and a straightenning balm. But my hair has so many layers and its chunky looking(heres my hairstyle a href="http://991.com/newGallery/Hilary-Duff-Hilary-Duff-296226.jpg" rel="nofollow"http://991.com/newGallery/Hilary-Duff-Hi…/a and I LOVE the cut. No matter what I do, theres always kinks in my hair, my hair flips in weird ways and is so wavy and super thick and coarse. heres my pic a href="http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=126987122&albumID=1309482&imageID=17885523" rel="nofollow"http://viewmorepics.myspace.com/index.cf…/a Espaically becuz of the layers, I know it makes it curly. How can I completely get it straight like this a href="http://www.poster.net/duff-hilary/duff-h..." rel="nofollow"http://www.poster.net/duff-hilary/duff-h…/a even though I know her hair is thin. This is me when I do straighten my hair a href="http://viewmorepics.myspace.com/index.cf..." rel="nofollow"http://viewmorepics.myspace.com/index.cf…/a sorry for all the pics