Assign material and guiskin to variables

I have a material called White Unlit and a guiSkin called GUISkin, these are stored
in the Materials and GUISkins folder.

I have a script that requires these to be set so they can be used on some GUI elements. The script’s overall function is here. Unity: How to create a speech balloon | 41 Post it’s used to make speech balloons.

var mat:Material;
var skin:GUISkin;

how do I assign these to the variables.
Right now I have to do it manually from the menu.

Thanks,
Dan

Materials and GUISkins are both Assets. I think the post Accessing Assets from Code answers your question.