So I'm guessing you already have Homebrew.
The only thing i will say is make sure you have the right version of DVDx. There's 2 versions, one for 3.3 or lower, and one for 3.4 or higher.
P.S. I don't recommend Homebrew at all. If someone doesn't know what they're doing, they can easily turn their Wii into a brick, and the pro's of homebrew don't outweigh the con's of it. (and DVDx can't keep up with the DVD's to have smooth playback, even a cheap dvd player is better)