Source: Operations Manager Product Team Blog

"Below is the complete list of all the command line parameters for OpsMgr 2007 server roles including Audit Collection. And the command line parameters for upgrading to Service Pack 1 (SP1) Release Candidate (RC)

Agent – (MOMAgent.msi)
msiexec.exe /i \\path\Directory\MOMAgent.msi /qn /l*v \logs\MOMAgent_install.log USE_SETTINGS_FROM_AD=0 MANAGEMENT_GROUP=<MG_Name> MANAGEMENT_SERVER_DNS=<MSDNSName> ACTIONS_USE_COMPUTER_ACCOUNT=0 ACTIONSUSER=<AccountUser> ACTIONSDOMAIN=<AccountDomain> ACTIONSPASSWORD=<AccountPassword>"

Go for the complete list to source.