As for getting icons, you'll discover the wiibrew database mentioned in the page above lacks a lot of them. Try this for a fairly complete set: http://gbatemp.net/index.php?showtopic=155191 Right click and "Save Image As" to get them. Rename them to icon.png and put it in the programs folder with the boot.dol
make a folder on the root called 'apps'
make another folder in 'apps' and name it according to what program it will contain
place the .dol file within that folder and rename it 'boot.dol'
it will now show on the hbc
I recommend Homebrew Browser - Put it on your Wii and you'll never have to worry about finding icons for the homebrew, and it makes it really easy to install new homebrew or update ones you already have.