Artur Leao and i am wrote on the same Project. I am finish with my Render Optimizer at 3dsmax2011. I have fixed Bug (undersampling for unified Sampling + progressive Rendering) and wrote a new UI.
Look at my Blog: http://www.infinity-vision.de/blog/render_optimizer
TIP!: for IBL Rendering at 3dsmax2012, can you donwload Shader Utilities at 3dsmax2012.
SU Pro at 3dsmax2012: http://www.infinity-vision.de/page/su_free_version