Irrlicht Engine

I'm currently building maps in DeleD and Lighting them in Gile[s]. This poses a problem because Gile[s] Renders its light maps in png format. As You all may know DeleD doesn't support PNG or any Alphamap holding formats (That i am aware of) So I need a sugestion on a path to take. there are plenty of other formats to export maps to that irrlicht can read. My idea (before reconcidering) To place the png onto a higher level in maya's multitexture shader then alpha (eather that or in the diffuse attribute) Then it came to mind that .obj probably only supports one texture layer.

So what do you think I should do?

Any ideas?