Package
The MSI package containing the product's upgraded version. This package will be extracted with an administrative install in an administrative image in order to create the patch.
Patch Package
A custom package, made specially for this patch.
Symbol Folders
Windows Installer can use PDB symbol files generated for PE code files (EXE, DLL, etc.) to generate more optimal diffs, thus reducing the patch's size. Use the button to add a folder, the button to replace one or the button to remove it.