Be careful!
Unless DLP has gotten some serious upgrades/enhancements, all you can do is a cold standby. Cutover would require manual intervention.
The Enforce server and the detection servers don't have a concept of "mutliple" Enforce servers. If you point two or more Enforce servers at a detection server, your system is likely to behave badly.
Likewise, the Enforce server has no concept that another Enforce server could be using the database. If two Enforce servers access the same database, I shudder to think what would happen.
JGT