1) Yes, you can use XCode's New command to create a new file. Specifically, New > New File... and you'll probably want to choose the Other > Empty template. This will create the file and also add it to your project.
2) Creating a file that is not a source file will probably automatically add it to the target's Copy Bundle Resources build phase. To verify:
- Select the project in the project navigator
- Select your target
- Select the Build Phases tab
- Expand the Copy Bundle Resources phase
If the new file isn't listed there, you can drag it over from the project navigator.