I using the esr disc loader. I have followed all of the steps in order to patch the .iso and burn and boot. Last week I burned many games on Phillips DVD-R16x, and they all work fine. However, I ran out of them and started using Memorex, bc that's all I had at the time. I know that Memorex are pretty much crap, so it didn't surprise me that they didn't work when I tried. What bothers me is that I've used sony's and Verbatim and still nothing. The Sony's are 16x and so are the Verbatims. I've burned at max speed as well as 12x, 8x, and 6x using Nero and Imageburn, and still nothing.