Is there a tool for substituting a file in NullSoft installer?

[BlackWhite]

I have used 7-zip to explore the installer,
it does not contain the script file such as script.bin or
script.nsi.

So even if I can use 7-zip to unzip all files in the installer,
I have no way to rebuild it.

Is there a tool to substitute a file in NullSoft's installer?
Thanks.

[DARKER]

Maybe this is your solution:
- decompile script
- manually reedit script to be able compiled again
- replace your target file
- rebuild with your new file

[BlackWhite]

I have used the wrong version of 7-zip.
When I use version 15.05, it will not
hide the .nsi file.
Thanks for you suggestion.

[disauto]

i tested,15.05 is ok