They are the same steps that you would take going from 1.6ST to any 1.7x.

There is an article here:

(http://www.tmib.net/how-to-upgrade-osticket-from-1.6st-to-1.7rc4)

or the Wiki article here:

(http://osticket.com/wiki/Upgrade_and_Migration)

I of course have a preference for the first one since I wrote it. :)