The most important thing right away after you install homebrew is to install bootmii or preloader, as they both protect your wii from getting bricked.
if you are trying to install any ios or cios or even themes , its pure suicide to do it without both programs as those installations will eventually brick your wii.
these are the advantages of preloader and bootmii , (prefered choice is bootmii).
1-Boot mii: BootMii is a piece of software that can be installed as an IOS or
inserted into the boot process. As an IOS, it provides a fast way to
back up your Wii's internal NAND flash memory, and will eventually form
the basis of a new generation of homebrew applications for the Wii.
Inserted into the boot process, BootMii provides you with a "safety
net" -- you can back up your entire Wii to SD in under three minutes!
If you were to brick your Wii, BootMii would still run and let you
restore your backup from SD, quickly and painlessly. BootMii also
allows you to directly boot The Homebrew Channel or other homebrew from
SD, bypassing the "warning screen" and the rest of the menu.
2-Preloader: Preloader is a small application which places itself before the
System Menu. Its main feature is to directly boot the Homebrew Channel
or a file you can install from a FAT device. Preloader is also able to
apply memory patches the system menu to remove limitations
or other things.
Since Preloader places itself before the System Menu any problems that would cause
the System Menu to fail are not causing your whole Wii to stop working.
If autoboot is enabled and you want to access Preloader's menu simply hold RESET
while powering the Wii on
Preloader offers hacks as: install additional System Menu patches, simply copy the "hacks.ini
included with preloader into the root of your SD card. (Ensure you are using the correct hacks.ini for your Wii's region.)
Then, boot into Preloader's settings, and chose to enable or disable the patches
in the Hack Settings menu.
Once applied, your patches are placed in NAND, so feel free to erase the file
on your SD card.
The format for adding additional hacks, or patches, to your hacks.ini file is simple
and should explain itself.