Stratus,
1. Liveupdate will download the service packs to the system, but will not automatically update your existing policies. If you wish to update your existing policies (after they have been downloaded), you need to right click an existing policy and select "Update Policy." You will then be presented with a dialog where you can select the policy pack you wish to update the policy to. As always, I always recommend making a backup of the policy prior to performing the update. You will then want to test the newly updated policy on a handful of policies before applying it to all of you systems to ensure nothing changed that could have an adverse effect.
If you wish to create a new policy based on the newly downloaded policy pack, you will want to create a new folder under the policy view and then click the "Create Default Policies" button in the tool bar. This will pop up a windows which will again ask you which policy pack you wish to use to create the default policies. You will then have your default policies which you can use as your jumping off point.
2. "Unix" policies are good on all flavors of *nix. You can use the same Unix policy on Linux, Solaris, etc.
Chris Tyrrell
Compliance Practice Lead
Conventus
ctyrrell@conventus-sei.com