Sue,
I restored without KEEP_REPLICATION option on my system when publication/subscription was not existing on my system. After restore I saw the publication/subscritption under Replication  in the Sq lmanagement studio, though there were no agents for publication/subscription. Someone else told me that KEEP Replication option was to preserve replication settings on  the target system to which restore was being invoked.
What is correct?
Padma