With the Project Publisher addin, you could create installers for your addins easily. With the power of NSIS, you could create small and powerful installers.
Project Publisher have support for MUI2, MultiUser and other NSIS plugins.
The addin comes with common licenses such as GPL (versions 2 & 3), LGPL (versions 2 & 3) and BSD so you only need to select one of these to show them in the installer.
RadASM 2.x Binaries - Zip File
RadASM 3.x Binaries - Zip File
Sources and Binaries - 7-Zip File