Also, if you have some build settings that you'd like to apply across
many projects, you may want to consider build configuration files.
Check out the following document from Apple:
http://developer.apple.com/tools/xcode/xcodebuildsettings.html
I don't know if you've already read through the Xcode User Guide, but
two parts of it that you may find useful are:
Build Settings
http://developer.apple.com/documentation/DeveloperTools/Conceptual/
XcodeUserGuide/Contents/Resources/en.lproj/05_04_bs_build_settings/
chapter_33_section_1.html
[http://tinyurl.com/3v4ccz]
Build for Release (describes installation)
http://developer.apple.com/documentation/DeveloperTools/Conceptual/
XcodeUserGuide/Contents/Resources/en.lproj/05_07_bs_building_product/
chapter_35_section_7.html
[http://tinyurl.com/53jklc]
In the case of your installation settings, I believe you'll want to
set those on the Release build configuration of the target associated
with the application or framework you wish to install. Some of the
settings will already be configured in the Release build > configuration.