From Adobe main T&C:

http://www.adobe.com/misc/copyright.html

"By posting or otherwise submitting Images, you grant to Adobe and all other users of this Site permission to use your Images in connection with their use permitted by these Terms of Use (including making prints and gift items incorporating such Images), including an unrestricted, irrevocable, non-exclusive, worldwide, royalty-free and fully paid up license under all Intellectual Property Rights to copy, distribute, transmit, publicly display, publicly perform, reproduce, edit, modify, translate, transmit and reformat your Images, with or without having your name attached to such Images, in any manner or form and for any purpose, with full rights to sublicense such rights through multiple tiers of distribution. You will receive no compensation with respect to the use of your Images."

'....and all other users of this Site' !

Even if they change the PSXpress T&C does this override those ?