Click the Preference 
button.
Activate the Drag and Drop Automatic External Files box in the Object Manipulation section.
All the image files applied by means of the drag-and-drop feature will be external afterward.
Instead of saving everything in your project, iClone also gives you the option to load texture images and videos as external files. When sharing or moving such a project or prop, the external files that the project or prop refers to have to be moved along with it.
If you want to have all the image files applied to be external files as you use the Drag-and-drop feature, please follow the steps:
Click the Preference button.
Activate the Drag and Drop Automatic External Files box in the Object Manipulation section.
All the image files applied by means of the drag-and-drop feature will be external afterward.
Before sharing project or prop file, please click the Project tab and click the External Files button. A text file that contains a list of all external files and their locations - [External Image List] and [External Video List] - will be opened.
After you move a project to a new folder, the external files it refers to MUST also be moved to one of the following:
the project's new folder.
the video or popVideo folder (if any) in the new folder.
by default, the C:/Documents and Settings/All Users/Documents/Reallusion/Shared Templates/Video (XP) or the C:/Users/Public/Documents/Reallusion/Shared Templates/Video (Vista/Windows 7) directory.
by default, the popVideo, ImageLayer, Intro, Facial Animation, Water, or Digital Juice folders under the C:/Documents and Settings/All Users/Documents/Reallusion/Shared Templates/Video (XP) or the C:/Users/Public/Documents/Reallusion/Shared Templates/Video (Vista/Windows 7) directory.
If you want to move a custom prop with external files to a new folder, you MUST also move the external files to one of the following:
the props' new folder.
the Texture, Textures, image, images, img, picture folders (if any) in the new folder.
by default, the iClone Diffuse, iClone Opacity, Aniamted, Face Normal, IBL, iClone Bump, iClone Blend, iClone Glow, iClone Normal, iClone Reflection, or iClone Specular folders under the C:/Documents and Settings/All Users/Documents/Reallusion/Template/iClone 4 Template/iClone Template (XP) or the C:/Users/Public/Documents/Reallusion/Template/iClone 4 Template/iClone Template (Vista/Windows 7) directory.