I would assume if you had random blocks installed on these other sites you would need to go back into those other sites and install those blocks in vba so they work. I dont see when I view your portal any photo blocks which tells me you have no active blocks installed.
For us to assist to tell you might be your issue trying to install your portal mods you would need to post or show the exact error here so I can respond. Thanks. Example your issue could be as simple as installation instructions. Example if your trying to use inc_features.php in your portal and your forum and photopost are in separate databases have you uncommented and filled out the proper lines in inc_features.php with the database info based on this thread?
PhotoPost Enhanced vB3 Index Integration
Just the bold paragraph is all you need to read.