Converting .pkg files directly to .zip format.
It is quite tricky to provide details on how to convert .pkg files directly to Zipped Files (.pkg to .zip conversion). This is, most likely, related to several possible archive conversions from one of many package file types (there are several formats using the .pkg suffix) to common .zip archive.
Considering that .pkg files are basically just renamed common archive formats, such as .zip, .rar, such a conversion should certainly be possible. We are, however, not aware of a software or conversion utility capable of a specific .pkg to .zip conversion. It will depend on the original software that created the .pkg file.
The database currently does not contain any pkg software converter.