[Maul]

	<Frame name="MyImageFrame" parent="UIParent">
		<Size x="50" y="50"/>
		<Anchors>
			<Anchor point="CENTER"/>
		</Acnhors>
		<Layers>
			<Layer level="OVERLAY">
				<Texture name="$parentMyImage" file="Interface\AddOns\MyAddon\MyImageName.tga">
					<Size x="50" y="50"/>
					<Anchors>
						<Anchor point="CENTER"/>
					</Anchors>
				</Texture>
			</Layer>
		</Layers>
	</Frame>

Thia would be one basic XML way. Replace the file path with one to your file. Make sure your texture is WoW compliant