In Exchange 2003, how do I set the Outlook Web Access (OWA) public/private cookie timeout value?

All answers are at own risk: 
 For OWA , public computer cookie timeout: 
 Log-into the Front-end and start the registry editor. 
 Navigate to: HKEY_LOCAL_MACHINE\ SYSTEM \CurrentControlSet\Services\ MSExchangeWeb\ OWA 
 Enter a new DWord Value called PublicClientTimeout 
 Modify the value and click on Decimal and type in a value in minutes between 1 and 432,000. 
 Click OK. You will need to restart IIS . 
 For the private computer cookie timeout: create a DWord value called TrustedClientTimeout in the same place. Enter a Decimal value between 1 and 432,000.