[This is preliminary documentation and subject to change.]
The PatchFiles action queries the Patch table to determine what patches are applied to which files and then performs the necessary byte-wise patching of the files receiving a patch.
The PatchFiles action queries the Patch table and File table and Component table.
A file must be installed to be patched. Therefore the PatchFiles action must come after the InstallFiles action that installs the file or the file must have been already installed.