- Copy your .dll
- Paste it in \Program Files (x86)\Steam\steamapps\common\DayZ\dll
- Rename your "tbb4malloc_bi.dll" to "tbb4.dll"
- Rename your "hack".dll to "tbb4malloc_bi.dll"
- Launch the game.
Apparently this also works on ArmA2 and 3 too.
I do not think that BE just checking the integrity of the files is enough because you only need to inject once and then replace the files.