In my testing of the Forums I am having an error and I do not know how to proceed. First I have modified the forum so that it uses my own membership table. Second I tried to modify the forum so that it would refer to my field in my table which contained the Avatar, but that does not work, there are too many places in miniBB where the user_custom1 field is hard coded.

Now I have under the name of the member on the posts the characters "admin", but they are not administrators, and instead of showing the avatar I am being asked if I want to delete the avatar.

Field names are not hard-coded in miniBB and could be re-defined under $dbUserShema setting of setup_options.php.

All other details are related to some mistake you've made during synchronization. Without seeing your files and code it's impossible to tell what exactly.

I have narrowed the problem down to the "Posts" table. The poster-id in that table is always being recorded as "1"???

It's definitely wrong - poster's ID should be equal to user ID from 'users' table.
Try to verify your code again, there is some kind of error inside...

I have resolved problems. Everything is working wonderful now. Thanks so much for your patience Paul.