Thank you,
but by using that I can only change the engine resolution.

The resolution is right only the var screen_size is wrong. (bug)
Even when it would solve the problem I would need to call it
after loading the saved game and then the engine reads an
other part of the code and not the part behing load(...

Screen_size.x and screen_size.y are sometimes wrong:
That`s way I tried to make my own var "real_screen_num"
and "real_screen_size[3]"
When real_screen_num is 7 real_screen_size.x is 800 and
real_screen_y is 600. ( "if(real_screen_num==7)"....)
So I need to know how I can make real_screen_num only
change when I change the resolution and not when
I load a Slot.

How can I do that?