ReplaceEm

I Dunno bout this but the license seems to be acceptable specifically this clause:

You have the right to redistribute this program so long as all the files originally included with it are also included in the redistribution unaltered. You may not charge specifically for this program without permission from the author, although a general shareware distribution charge may be applied to it if the charge is not specific to this program.

Seems good though I don't know NSIS so I can't do it.

Maybe you should try this:
[Link removed by Moderator RM: Open-source software is the only type of self-promotion allowed on these forums. This is your last warning. Any more non-open-source programs and you will be given a temporary ban (Repeat offences will find you getting permanently banned)]