To try this out straight away either type in the following line at the command line
(assuming that the current working directory has been changed to where the files have
been extracted from the ZIP): .\Image2PDF.exe -image test.jpg -output test.pdf -UseActualImageDPI -openpdf
Or double-click on the test.bat file.
Both of these will convert the test.jpg image into the PDF document test.pdf and then attempt to open it using the default PDF viewer.