Hi,
"aMember also gives you the option of using a .htaccess files to password protect your entire site, or parts of your site that don't use UBBT, but we don't do that."
Yes, this is what we do have / require. Unfortunately it does not seem to work. If I understand my partner correctly then the integration of aMember and our site works, but he cannot get it to also update a group on the message board.
Anyway, seeing that you use a different setup...
Sanuk!