I wanted to know if this feature available in 360 or SL3?
It's not a built-in option. You could use some third-party SCO packager to combine several published Storyline projects into one package.
Is there a specific way that I need to publish the scorm files in SL3?
How should I link the different sco files to the 'main menu' storyline file?
It's not something we can offer support for, but you could take a look at the method here to set it up.
Let us know if you need anything else!
In the Link you mention @ashley. The third Link leads to a homepage, which doesn`t show its pictures anymore. http://www.tracyparish.ca/2013/02/creating-and-tracking-a-storyline-course-with-multiple-quizzes.html
Thanks for letting us know, Niko. I'll get that tidbit passed on to our team to update the documentation. The website is one of our community members though, so not sure that it will be updated.