Originally Posted by sydude
So there are no conflicting databases, phrases, etc?
As Chuck said, no. The reason being is that PhotoPost Pro will pull information from vBulletin, such as the users and templates, etc. but it does not create new vBulletin phrases and the such. That's how it is able to be intergrated with virtually any forum software. vBGallery, on the other hand, is a vBulletin only product and intergrates directly into it so it adds phrases, templates, etc. to your vBulletin installation.
In short, as long as you keep your PP Pro stuff in one folder and your PP vBGallery stuff in a different folder you'll be fine.