Small update

A small update is like a minor upgrade except that it's usually smaller in scope. You might use it when only a few files have changed and you don't intend to change the Product's version number.

The steps to create it are mostly the same as when creating a minor upgrade patch.

1. Create a new WiX project with the modified files. Do not change the Product element's Id or Version.

2. Build the old and new versions of the product, storing the .wixpdb files that get created.

3. Create a patch .wxs file that defines the contents of the patch.

4. From the command line, build the .wxs file with Candle and link it with Light to produce a .wixmsp file.

5. Use Torch to generate a .wixmst file of the differences between the old and new .wixpdb files.

6. Use Pyro to merge the .wixmsp and .wixmst files to create an .msp file.

This gives you a patch file that when used will update files, but won't change the software's ProductCode or version.