why don't you use wuat?
look for wuat v2 , and execute the start.sqf file that comes with it, find and installation guide and work from there?
Pretty simple.
1: Download wuat v2(or something similar)
2: Extract somewhere
3: Place in the arma2 OA file (if you can't find this give up)
4: Run Dayz and join you're server.
5: Run the executer
6: Navigate to the file waut(which ever) find the start.sqf and execute,
7: Go back in game and press scrl and the menu should pop up
Disclaimer,
DO NOT join any BE server with wuat in you're file directory i think this can result in a global ban.