scook
If you are still on X3, go to Preferences > File > Audio Data and enable "Use Per-Project Audio Folders." The latest version of SONAR and CbB do not have this setting and are set up to use per-project audio folders
To create a project folder containing the project and audio from an existing project - open a project, then perform a "Save As", make sure "Copy all audio with project" is checked and specify the new folder to store the project.
I've been doing just this over the past few weeks with all my own projects, and there's a small bug in this area...
Say, I've got project Project123 in my default projects directory (D:\Projects - it's an old project so the audio is in my wavedata directory (E:\WaveData :
1. I create a directory Project123
2. I go to Preferences and ensure the settings you've described above are set
3. I "Save As", specifying D:\Projects\Project123 as my directory, and Project123.cwp as the project name
In X3 I correctly get D:\Projects\Project123\Project123.cwp and my audio in the D:\Projects\Project123\AudioData directory.
In SPLAT and CbB I get D:\Projects\Project123\Project123\Project123.cwp and my audio in the D:\Projects\Project123\Project123\AudioData directory. So basically it's created an extra sub-directory.
Not a huge issue, as I can just quit out of SPLAT / CbB and move the directory... but something to look out for as it's confusing.
M.