OK?I made some more changes
There was an issue with form variable names on nntp_groups.php line 278 (original line 256), of the same variety as the print_forum_chooser problem on line 263 (241). This was causing problems with "Add Newsgroup", rather than "Edit"; when trying to add a newsgroup, the forum would be set to 0, rather than the forumid.
Also, I replaced all instances of
$vboptions['...'] with
$vbulletin->options['...'] and
global $vboptions with
global $vbulletin in functions_nntp.php. Looks like this affects a lot of attachment stuff.
I have no idea if attachments work now; perhaps someone will test it and share their results :squareeyed:
My earlier post has the updated .zip file.