i finally got -dev mode to work with the vitality crack.
here's what you should do:
1. download this
Link, its another crack for DOW2
2. extract to DOW2 directory
3. u should have a file called rev.ini, edit this part
ProcName=dow2.exe
to
ProcName=dow2.exe -dev
4. play the game with -dev mode enable
enjoy
i tested this and is fully working, i have installed the game using the vitality installer