Nullsoft Installation System is a pretty small, efficient, capable installation system for Win32.

Here's what's new:

Included caps.nsh and piglatin.nsh (language changing headers to !include), and upgradedll.nsh (upgrading DLL example).
Made it so that File /oname= can take full paths.
Fixed GetFileTimeLocal and GetDLLVersionLocal Made installer progress bar colored with listbox, and not limited to 32768 instructions.
Added ShowUninstDetails.
Added MiscButtonText, DetailsButtonText, InstallButtonText, UninstallButtonText, CompletedText, and extended DirText for browse button.
Added /CUSTOMSTRING= switch to InstType.
Added WriteRegExpandStr.
Added ExpandEnvStrings.
Reduced size back to 35.5kb.
Made config.h even better (you can now turn off compression if you desire) :) Fixed date/time setting of files extracted with File.

Download Nullsoft Installation System v1.6 Beta 2