May want to get more info on this from Symantec themselves. Last I heard this was being phased out....
Admin guide for it is here:
http://www.symantec.com/docs/DOC4336
Also, note, it's not being tested or supported on 64 bit OS.
As for the 10k limit note, no clue why that says that but I've used thisbefore years ago with less than 10k clients.