Custom inspectors and texture2d/sprite fields.

Hey,

Is it possible to get ObjectFields for Sprites and Texture2D to appear as they do in an EditorWindow or, for example, like a material's texture field, in a custom inspector. All I can seem to get is the default rectangular object field like you would get with a float or a string.

I've been looking for a while but I've not found anything useful yet(or perhaps I'm just useless at looking). Any advice would be appreciated.

Thanks.