HudsonGray
I don't know if it can be, the High Priestess has the Pamela Colman Smith signature mark at the bottom right. There's a copyright issue.
I DON'T KNOW ABOUT YOUR DOVER (CD-ROM) BOOKS ...
...but both of mine - 'Vintage Holiday Cuts' & 'Celtic Designs for Craft People'- have a VERY SPECIFIC copyright notice in them that says: "These images belong to Dover Electronic Clip Services. You may use them for graphics and crafts applications free and without special permission, provided you include no more than ten (10) in the same publication or project. For permission ...etc., etc.
HOWEVER - replication or reproduction of any illustration by any other graphic device, whether it be in a book, electronic, or any other design resource is strictly prohibited. "
I would check with www.dovertechsupport.com before I buy a copy.