David,
It wont be good idea to use those modules. This is from Daniel from one of my emails in the list :
"SIP SIMPLE and XMPP presence specs are not one-to-one compatible in
terms of architecture/specs. The
xmpp module is able to translate some
of the basic presence concepts from one to another, but not everything.
The module is also a bit old, i haven't seen much activity around it to
be able to assert to how level it can help.
Another approach that I saw in the past is to leverage some (REST) API
between the SIP server (kamailio) and
XMPP server (iirc, it was prosody)
in order to genenrate presence events/messages in both sides. Kamailio
has PUA modules that can get control commands via RPC (e.g., JSONRPC).
'