For Wii Retail Injection, is it select game file and then build? Is that pretty much the gist of it? This is my first time injecting my Wii game so I want to be sure I am doing it correctly.
Well first have you gotten the needed keys and added them without that you can't do anything.
If you've got that yes you select game file then Download images from cucholix's repo, then on Gamepad/meta tab you have to put in the name of the game (don't use special characters) then some games only work with Wiimote so you don't change anything with that but some games you can use gamepad (you must use the compatibility list to see which ones do or don't) I usually do Horizontal wii remote emulation, then you build.