Hello I need help with the following, very noob, question:

In Readme.txt file of the Letterbomb installer (please.hackmii.com/) it says the following:

Installation instructions:
NOTE: The HackMii Installer will automatically install BootMii as IOS upon
startup. Starting with v0.7 it relies on it and there is no way to prevent
this step. If you don't want to have BootMii as IOS installed, you can
uninstall it after e.g. installing The Homebrew Channel. When doing so, the
HackMii Installer will automatically exit, because it can't (un)install
anything anymore without it.

Yet, I remember when installing, the black screen showed message that "BootMii Can only be installed as an IOS". From that screen, I installed only the HBC, and made sure not to install BootMii, because I didn't need it (I'm using HBC only because of Wiimmfi).

Which one is true then - do I have BootMii installed or not?

Thanks for quick answer. Okay, no such button when I click home button on Wiimote when in HBC. So that means it is not installed.

It still puzzles me, this note from the Readme file. Perhaps this note is a leftover from some older HackMii installer version? Perhaps the current HackMii installer doesn't rely on BootMii anymore?

Otherwise I try to understand the processes behind the installation and different IOS-es, I read the UHG through and through, but I fail to understand many details because I use Google translator. I do read wiibrew wiki as well.

Yes, I understand. But in Readme file it says that the HackMii installer by itself "automatically installs BootMii as IOS upon startup". That sounds to me as if the HackMii installer wouldn't even work without the BootMii installed first.
Yet, it seems that this is not the case, the installer only gives you an option to install BootMii as IOS. At least that's how it looks from my side of view. Is there any process inbetween which I am not aware of? Some kind of background installation of BootMii while the HackMii installer is running in real time?

I can also post here my "installer.log" txt file from my HBC installation so you can see what was happening during the process. Even though, I am not sure if it is safe for me to post this installation log data publicly. It contains some check up of installed IOS-es and examining of boot2 blocks etc.

I have one more question - about updating system when original game disc asks for it.

I read about numerous ways to bypass updating, but it includes further modding and installs. I plan not to mod anything else on my console. The only thing I have done so far is installed the HBC through the LetterBomb, from pleasehackmii site. Without BootMii. This was first time ever on the console, 3 weeks ago, otherwise it is a completely original bought console.

I do plan to buy "Zelda SS" soon, which I know will ask for a system update. What will happen if I update? Are any of my IOS-es modified? Is there any risk of any change or is the system update safe?

My system at the time of installing HBC was and still is 4.3E. System itself is also freshly updated because like 2 weeks before I installed HBC, I bought Black Ops disc which also asked for system update, which I did.

Never modded anything else prior to that.
Idk, I'm just very very very not comfortable with modding the console.
I find different answers around discussions, some even said that the latest Letterbomb is imune to this system update, that nothing happens if you update the system when the game disc asks. That the worst case scenario is that it removes the HBC.

I'm still actually trying to figure out is the HBC installed as IOS, so the update would simply make it a stub, or is the HBC'c code installed somewhere else in the system code.