I really appreciate that.
Yes, I can get into the admin panel just fine (After clearing out the pp_cache table -- does that tell you anything?)
As I say, the table pp_categories, when full of our old data, seems to be causing the problem (when i empty that table, photopost displays ... without categories obviously).
I tried to PM you the login details ... is there a way I can get you that info without posting here?
Also -- what does the installation cost? That is an option we may want to explore.