If you are not using Visual Studio 2008 and just want to use the Convert Program, then the only files you will need are
Put these two files in a folder and run the exe file.
On the form at the top use the browse button to select the directory where your IMP files are located if you have sub directories with IMP files check the check box to include subdirectories.
This will load the list area on the Library tab. Select a book by single clicking it and then you can use the other tabs.