Is it safe to install 0.4 priiloader for my 4.0U(Korean changed region)???
I have already Preloader installed(it make the booting slow)
That is why i want to change to priiloader
Is it safe???Can I brick my wii with it???
If i am bricked because of this can I still go to my priiloader menu???
As I stated in the softmod guide where you asked this before, there's no harm in updating to 4.1 to install priiloader. This update would also remove preloader for you. Follow those steps in dogegg's guide to update and install. It does work on 4.0 but to remove preloader the update would be the best thing for you since it would get rid of preloader, allow you to install priiloader, and put you on the best system menu.