Resize Gui Texture

hello everyone,i have a crosshair in the middle of my screen, and in FPS games when you run&jump you know the crosshair gets bigger. I want to enlarge my Gui Texture but i just couldn’t find the right code. Can anyone help me?

As far as I know, GUITextures have a transform property so you might be able to change the scale of it by using this: http://unity3d.com/support/documentation/ScriptReference/Transform-localScale.html