the installation state it is not installing and some error in data01.arc.................and the game size is just 1.1gb...plz someone give me a data01.arc file

Urgent Please Help someone. I extracted deus ex human revolution of kaos release.Unfortunately unpack.bat file has been deleted.
Other files remains safe. Anyone please send the "unpack.bat" file to my mail id.
My mail ID is "saravanalenovo@gmail.com".
The file is only 1 kb.But it will save me from ...