I know from personal experience that some of the wiis beginning with LU64 will not mod with any method I have tried and I have tried many.I had 6 of these wiis fail on me in a span of 2 days.By the way went to Wal-mart today and I told them to let me check the serials on the boxes before I bought them (with the excuse that I heard the dvd drives were bad) and I settled with LU38 and the mod worked flawlessly on the 2 that I bought with the exact same method I tried on all 6 of the LU64 models. I have seen many more people coming forward with this same issue and it is a fact that some of these wiis have a different file structure than the others. Install ios16 with Wad manager 1.3 and then use customer wad manager to install ciosfix and you will see what happens on these things. After this nothing works right, WD 1.3 will not load (black screen), anyregionchanger loads but gives 3 errors at beginning and gives more errors after it downloads files,cios downgrader 1.1 and 1.0 will not load(black screen),ios downgrader will not load (black screen again).Tried to use nandumper to see what was going on and some other package (cant remember) and would not load a single file.I even tried to load them manually offline (one wad at a time) and no files would load at all lol. I mean it is crazy because nothing works on these things. I created this post to compare notes with others who have had the same problem and maybe we could all find a fix for this mess. So if you are having this problem or have a opssible solution please post it here. Thanx.