I have a few questions about installing Neogamma R9 (beta 50)

1. Do you need Homebrew Channel to install this?
2. Can you install Neogamma from a USB flash drive rather than an SD card?
^ If not, does it have to be a SD or can it be SDHC?

I have Wii System Menu 4.3u

Sorry if I'm asking about the obvious, I'm new to this kind of thing