What to use for creating a quick and light setup file?

Question

I am considering helping an open-source gaming project with creating their setup file. The game is currently weights around 300 MB and is packaged in a zip file, playable st

Answer 1

For OSX, this looks nice for making DMG's:

http://www.araelium.com/dmgcanvas/

Catch is that it costs $15 or so.