If you do end up not being able to fix the 120.dll error. i have cnonfirmed that the hack before this; simple CANA is still working almost perfectly(the chams is a bit glitchy). since 10:00 am sydney australian time, i have not encountered a crash. it is still working.
follow this modifed tutorial:
1. download the hack and extract it in to a folder with 7zip or winrar.
2. cipher it using the 'simple PE cipher' on this forum.
3. using extreme injector (which is what i used), go to the options and choose scramble .dll and scramble it - name it something random like cucumber.
4. in the options, click start in secure mode, this will restart the injector with a weird name.
5. check all the square(radio button) options and tick the third option on the left hand box(manual map i believe). make sure it is set to auto inject.
6. select your scrambled .dll and make sure that is all that is selected.
7. the process is Engine.exe
8. check that the .dll has weird name, the injector has a weird name, is set to auto-inject and that your anti-virus software is disabled.
9. start up combat arms, when you press "game start" a pop-up window should say "coder Dias"
10. in the log in screen or before that, there should be a menu of three hacks which can be toggled with the arrow keys and "insert".
11. wait until you are in-game before enabling a hack (just to be sure and disable in the lobby).
hope this helps.
if you crash then you must've done something wrong or i missed a step in explaining the process.