Saw this on Adobe's site. It's a way to increase photoshop performance on machines with more than 1 GB of RAM. http://www.adobe.com/support/techdocs/331372.html My gripe is that I can't remember the last time I ran Photoshop CS on less than a gig of RAM. Sheesh, you'd think they would have made this performance boost standard, or at least mention it during the install. This is a little known tidbit hidden away on adobe's website that very few people will see or implement. Seems like kind of a waste that people with more than 1 GB of RAM will never know about this and will never get the performance boost.