yes but the photopost is trying to use the pp_usergroups table..
is this in your install or when you look at the photopost page? under photpost you must have
User Registration System set to threads
the uder database table prefix set to w3t_
send me a PM with an act that I can look at on your system. easiest is to send me a url link and for you to create a user called threadsdev with a password of threadsdev with admin rights so I can putter around then change it back to user only rights after I am done. shoot me a PM.