Apple - In Xcode 4.3, where do I put the additional tools?

1. Find Xcode.app and open it by 'Show package content'
2. Drag and drop new development tool from downloaded .dmg to /Applications inside Xcode
3. Add yourself to 'Sharing & Permissions' of /Resources with rights to read/write

4. Repeat step 3 for file

    /Resources/IDEHelperApps.plist
   

5. Open file IDEHelperApps.plist in TextEdit.app

6. Add string with name of added tool to first array. For example:

   <string>Contents/Applications/PackageMaker.app</string>
   

7. Save .plist and restart Xcode.

Put them wherever you want. Unix and Mac OS do not care where your executable files are.