I want to make a installer using nsis , but i can't find a example which shows how to execute a command prompt commands on some files using nsis . Is it possible or i am completely off track ?
You want to run an external command, like a third-party installer or a system command from your own NSIS installer?
I think you are looking for ExecWait command.
And the Embedding other installers section of the NSIS wiki may also be of interest.