Upgrading INN from Ver 2.1 to Ver 2.2.2

[Bhangui_S]

Hello
	Running INN Ver 2.1 on a Solaris 2.6 Box. Need to upgrade it to the
latest version. (either 2.2.2 or 2.3) had couple of questions regarding
upgrade.

*	Is there a graceful way to upgrade so that the software will take
care o everything? If so what is the procedure? Is the procedure explained
in the readme file which comes along with the software. In my first reading
I could not find anything on upgrading but I may have missed it?

*	Or do I have to remove the old version completely from the system
and install the new version? (I am sure there should be way to upgrade to a
higher Rev level)

Would appreciate if someone could through some light on this. You could post
it here or respond to me directly at (bhangui_s at bls.gov).

Thanks
Sandeep