The compiler allows using Custom Messages using {cm:} constant but lacks access to standard messages, for instance 'FullInstallation'.

There is a possibility to get standard messages using SetupMessage() but it can only be used in [Code] section, it accepts only 1 parameter and this parameter must be an enum (eg 'msgFullInstallation').

To avoid having to duplicate standard messages to custom messages, add a {sm:} constant permitting access to standard messages in the same way as custom messages.