Merge checked-out files while Replace unchecked-out files

[kinook]

No, but in the typical (and recommended) VSS usage, non-checked out files will not be writeable. Make sure 'Make local non-checked out files writeable' on the Flags tab of the SourceSafe action is unchecked, and that 'Use read-only flag for files that are not checked out' is checked in the VSS GUI (Tools | Options | Local Files).