the checkbox option would be easier to do, just except regarding already existing nicknames.
sharing the userDB is possible theoretically, but as you mentioned already, the moderator or usergroup problem in general is a tough thing to to....
so possible yes, but easy no
Checkbox system easier?
Why?
In my idea; it seems easier for me to register once and put the registerinformation in all forums.. But like I said I don't know much about MYSQL so when you say this is ""simple""; ok. .
I don't know exactly what data is shared. I already tolled my client that I was affraid that it wasn't possible because more data (like usergroup membership) is shared.
So; do you have any tips for me how I can do this? Or is ut just "too hard" to do?
Sure; everything is possible but it shouldn't take a month of work : -)