How do you place the images?
What type of images?
What preview do you mean?
(Adding to Willi's list of questions...)
Where are the images stored?
By cmd D.
Mostly I use full colour EPS, Tiff or AI files.
If you press cmd D you can choose an image.
The photoshop EPS files are saved as TIFF (8 bits/pixel) and coded ASCII85.
Images are stored on the computers HD