Ok, it seems that CHDK keyboard hooks working, but i don't understand how to call menu.
You cannot enter <alt> mode by pressing <print> key? Maybe keyboard map is incorrect (or something else ).
I can, but not from first or second try... Up, right, down, left and set keys works well in menu. It's a little BIG, but i have no time to make another one...
Video of how i get into menu is too big, so i'll upload it later.