This is the full package of Smokin' Guns 1.1 Release Candidate 2. Download it, unzip it, and run smokinguns.exe (Windows) or smokinguns.i386 (Linux). Please report bug at forum.smokin-guns.org as soon as you discover them, since this RC is likely the 1.1 release.
What a treat! It seems that the good classic mods here are getting releases more now than ever.
Technically, SG is no longer a mod. It runs on a modified ioquake3 and does not use Q3 assets anymore :)