Lite Version and Full Version

I'm getting close to being ready to submit my first app to the AppStore. I have pretty much finished the full feature version. Now I need to add advertisements and limit the number of items that are in the Lite version. I knew that in order to do this, I would like to share the same source files, but have some preprocessor conditionals for the Lite version.

I first searched for #ifdef and Objective C on Google. This got me part of the way there, but then I realized that the way to do it is using different targets in Xcode. Here is a very useful blog entry that explains how to do it:

http://www.pacificspirit.com/blog/2009/01/27/building_for_multiple_iphone_targets_in_xcode

And here's a site that does the same thing with screenshots:

http://adeem.me/blog/2009/05/03/tutorial-part-2-same-xcode-project-create-multiple-products-for-iphone-using-script/