Q. I'm not entirely clear on what AHBPROT does and why it means I don't need an cIOS loaded?
A. Let me give a short explaination, AHB is a bus to the hardware, PROT means protection, so with AHBPROT patched out, we gain full hardware access, no need for cIOS to access NAND and stuff, so in short if wiiflow detects that IOS58 is currently loaded and AHBPROT is patched out, wiiflow will just use that setup instead of reloading to a cIOS since most features work fine in IOS58 mode. Devolution for example needs AHBPROT patched out, you know it does a lot of crazy hardware stuff. Only a few cIOS really patch out AHBPROT (d2x v9 beta r49 for example does, v8 final doesn't), so if you use for example v8 final and then try to boot Devolution, it doesn't work. If you only boot wii games/channels, then a cIOS is used so that IOS58 mode is not needed, but if you boot plugins, homebrew or gamecube, then wiiflow will reload to IOS58, or in IOS58 mode just use it again. So the usage of that mode depends on your game booting. I have activated IOS58 by default because the time to reload to a cIOS is pretty short, and only the features of wii game booting/installing and channel booting need a cIOS. (by Fix94)
Q. For the games in my emunand there is a per game setting "Custom".. what is this and what does this do?
A. With this setting, you can control the boot method, if you enable "Custom" it uses the libogc method (only works with neek2o and real nand) and without "Custom" it will use wiiflows internal one (needed for d2x emu nand). (by Fix94) Basically then you may need to enable it if you're launching a channel from your real nand or neek2o.
Q. With savegame emulation - what is the difference between savegame (partial) and Full?
A. Partial uses game saves from emu NAND and Mii's from real NAND and Full uses both from emu NAND.
Q. In NAND mode - what is the difference between Partial and Full emulation.
A. Partial means it's using settings from real NAND for wiimotes, internet, etc... while Full gets everything from the emu NAND.