Set up your Wii for homebrew, which is extremely easy. You can either use CleanRip (which is useful since it also lets you rip GCN games if you have a b/c Wii) or a USB loader. Connect the HDD to the PC and if you used a USB loader, you'll need to use one of several programs to convert the files to ISOs (I think? Dolphin might support wbfs natively now).
Dolphin itself is just a matter of downloading it and running it. You can use the wiki and it has a lot of info about compatibility and settings for games, but it's very incomplete, especially for Linux and Mac.
Ah, okay, thanks a lot.
