[cheesegrits]

One trivial change to make things a little easier would be to add 'checked="checked"' to the cookieuser checkbox in the navbar login form, so it's set by default.

If you are determined to set the cookie after registering, you might try a plugin on the register_addmember_complete, which just does:

vbsetcookie('userid', $vbulletin->userinfo['userid'], true, true, true);
vbsetcookie('password', md5($vbulletin->userinfo['password'] . COOKIE_SALT), true, true, true);

I haven't tested this, but it might work.

-- hugh