Forgive me if this has been covered somewhere, but I have spent the last three evenings looking for a definitive answer to my questions and nothing seems to really answer them. I'd also like to say that I am by no means new to the Wii or softmodding. I softmodded my original Wii years ago and my sister now has it. I've recently purchased a Wii U and softmodded the vWii. I did a NAND backup, backed up my keys with Xyzzy and made clean WAD files with YABDM before doing anything with d2x. Now for my questions. I've never understood the IOS slot system. I know 249 is the most commonly used slot and that's fine, but guide also recommend installing d2x in 250 and some also suggest 251 as well. Why? How can you use these different slots? Don't game loaders just use 249 and if they automatically pick, why does 250 do something different from 249? As well, I know it's not necessary because of how HBC works now, but people used to recommend installing cIOS 236 to use as a backup if you need to recover. What does that mean? How do you "use" an IOS to recover? Nobody ever goes into detail. I have one final question. I've read a couple guides suggesting using slots 248 and 247 rather than 249 and 250 (which means using CFG Loader because you can change the cIOS to use), because using 249 and 250 will cause disc games with the 4.3 update on them to ask you to update even if you're on 4.3. I know this happened with my old Wii with Donkey Kong Country Returns and I believe I just used Priiloader to disable that. Obviously Priiloader doesn't work with the vWii but from my tests these updates don't pop up on the vWii. I installed d2x in 249 and 250 and Donkey Kong Country Returns works fine still. Does this issue not exist on the vWii? I assume it doesn't because the disc updates contain normal Wii software, so they probably disabled this (since the vWii is always on 4.3 anyways).