WCG load sharing,Yes it works.

Last week i was dealing with a V10k load sharing project,
v10k does not have load sharing feature so we put an alteon switch front of 4 v10k appliances,
our tests was fine,sessions were sharing along the appliances with round-robin.
Policy Server functions on it's own independent of the Policy Broker so i have left the 3 roles PS,US,FS on V10Ks
Although you can define one policy server during the installation of logserver, we have seen that we can successfully get logs from the 4 policy servers simultaneously,
also another issue was to upgrade v6.3x to 7.5 , dont forget to follow v6 to 7.0 to 7.1 and finally to 7.5

Websense DSS Restore Fails

This point is not clear yet in websense kb.
You have to Keep in mind that it was intended for recovery and not migration to new machines.

For instance the following should be identical:

OS installation partition and folder,
(change from 2003 Standard to 2003 Enterprise should be OK and not interfere with the "restore")
Oracle installation partition and folder,
Dss version and patch
Hostname
IP addresses and NIC configuration