Jabber on Drupal 5.x ?

_{[reposting in the correct forum]}
Hi,

I know the module isn't supposed to be ready, but I wanted to try on my 5rc1 install. So I downloaded the HEAD version of jabber, installed it, created a jabber.info file (it was missing), added the class.jabber.php file along it, enabled it, and installed ejabberd and jwchat. Now it seems it's running (I have a new "jabber ID" field in the user page), but there's no settings page to specify the jabber server, ID aren't registerd with ejabberd, and I often have this error:

warning: call_user_func_array() [function.call-user-func-array]: First argumented is expected to be a valid callback, 'jabber_login' was given in /home/parateam/public_html/includes/form.inc on line 217.

So:
- is there a mean to automatically register users with ejabberd ?
- is there a mean to autologin them in jwchat ?
- will drupal usernames (which can contain spaces, etc.) be valid in jabber ? or:
- will usernames be transformed like pathauto does ("Xavier Bestel" => "xavier-bestel") ? or :
- do I have to warn users not to use spaces, etc. in their usernames ?

I have very little sparetime, I know nothing about Drupal nor Jabber, but I did a bit of PHP in the past and I'd like to test new code if it exists.

Thanks,
Xav