Back up your database first. I would also suggest reading the project pages. Then update them individually and test the site. The jump on Legal is particularly large, so do it last.
 
Nancy E. Wichmann, PMP
(781) 697-6344
 
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: Chris G

I'm using drush to do it so it's mostly pretty simple, however I'm now
left with a few modules that say "Not supported!" on the Modules page in
Drupal and about which drush says "Installed version not supported".

They are the following:-
Legal                          6.x-2.2-beta4      6.x-8.5          Installed version not supported         
Login one time                  6.x-1.3            6.x-2.7          Installed version not supported         
Service links                  6.x-1.0            6.x-2.0          Installed version not supported         

If I ask drush to update them (it seems that it will, I tried it to see
what would happen but stopped it before it actually did the update) is
it likely that all will be well?  It doesn't look as if they're
particularly old versions.