There is a lot of information in web about what ReserveCost for
But could you explain me, the scenario of using it ?
1) Should I manually insert records in it and then manually in runtime calculate the summ of component sizes, account somehow user free space and present message about disk space loss ?
2) Or should I just insert the components in this table, and then InstallShield will by himself define user free space and by himself will represent the user with proper message ?
The Windows Installer service uses the information populated in the ReserveCost table at runtime to add additional costing to the components (and containing features) referenced in the ReserveCost table. Typically this table would be used in a scenario where Windows Installer does not already calculate the cost of a resource (for example, using a feature prerequisite). All the records added to the ReserveCost table must reference components that are present in the Component table.
