Thanks reecardo, I just came across these myself after looking at the database & schema map for SEP 12 with a little caveat as well. The commands you listed work if you run the component "Run Client Command Scan" but do not work if you use the command "Run Client Command Update Content And Scan". There are separate commands for that component which are along with all commands..
Update_Now = Update Content
ScanNow_Full = Full Scan
ScanNow_Quick = Active Scan
ScanNow_Custom = Custom Scan
Update_ScanNow_Full = Update
Content and Scan Full
Update_ScanNow_Quick = Update
Content and Scan Quick
Update_ScanNow_Custom = Update
Content and Scan Custom
CancelScan = Cancel Scan
Reboot = Restart
ApOn = Turn Auto-Protect On
ApOff = Turn Auto-Protect Off
FwOn = Turn Firewall On
FwOff = Turn Firewall Off
DeleteQuarantine = Delete from
Quarantine
Also, running smc.exe -updateconfig from the c:\program files\symantec\symantec endpoint protection\12.1xxxxxx\bin folder will update the policy on client.