We have an old add on for PhotoPost here in this thread.
Can someone take a closer look to it to bring the pppanel.php to work with Threads7 ? Instructions how to bring a link to the editor would be also nice. This is a mod what all PhotoPost user need.

Ironic, I just made this mod today! I'll try to get it tidied up and posted soon.

My version doesn't have pagination on the panel popup, so I'll have to add that in. My plan is to also allow an upload to photopost from this interface as well.

Sounds great. Would be very nice if you share it.

Sure!
https://www.ubbdev.com/forums/ubbthreads.php?ubb=showflat&Number=311899