dont have a lot of time right now so quick answer.
using wiiflow lite for all these answers
Q1 you could use the source menu with multi source on and select them all. then delete source_menu.ini to prevent him from accessing it to change them. also hide all views to keep him from clicking the view icon on the main screen.
Q2 with wiiflow lite yes you can just goto main settings and set nand choice to both
Q3 don't understand. they always do show full size covers just like wii games.
OK thank you, I switched to win flow lite and it boots so fast it's awsome!!!!
I cannot for the life of me figure out how to select multiple sources tho, graaaaaaaa!!!!!!