¿Which tool use to code collaboratively?

Hi all,

Me and my students are working on a collective project using Bots Inc 
and is the time to integrate the parts. I would like to know which is 
the better tool for that. I have been searching and there are different 
options: changesets and Monticello (may be more).

Monticello seems more graphical and may be more easy. I have installed 
it opening a Bot workspace (its similar to a classical workspace) and 
typing:

SMSqueakMap bootStrap.

after that I get the SquekMap and on it I search and install Monticello 
but after that I don't know how open it (Bots Inc graphical environment 
is different from the standard one, so World->open->Monticello Browser 
is not available.

* ¿There is a way to open Monticello browser with a command from a 
workspace?
*¿There are various Monticello packages listed in Squeak map 
(Monticello 2, MonticelloCVS, MonticelloMultiRep, etc). Which one should 
we use?

Thanks a lot,

Offray