last year I have done video about, how to entering nimbuzz room by using xmpp pandion .
know in this post I am going to show you using gajim, how can. you will online on multiple id’s with same time.

All you need is Gajim, To download gajim visit this site gajim.org  and download it

 

for reference check below pictures
 

in jabber id enter your Nimbuzz id
and @ just type nimbuzz.com

one you Click forward on gajim it show Account successfully  added. Now go to Advance tab

in Advance tab go to connection and and check tick on use Custom hostname /port
in Host name enter openfire.nimbuzz.com

now your gajim is ready  for nimbuzz .

Note:- with gajim you can be online with multiple id’s at same time
and you can enter room with multiple id’s.