When you add custom files into any CourseLab object, this file will be placed into images folder automatically. However, there could be situations when file is not a part of the object. These could be documents, additional files for Flash-movie or Java-applet etc.
One option is to use special object Additional files, which places all files in list into images folder.
Also you can create the folder user (exact name) on the same hierarchy level as the images and place your files here. All files from this folder will be included in course manifest and course package automatically. You can refer to these files using relative path.