I just happened to see your post about the exe driver file issue with no inf file. This happened to me previously.
Heres what I did:
1. Right clicked on the exe file>Selected 7zip>Another menu appears>Selected "extract to folder
(same as exe file name)"
2. A new folder will be created(same name as the exe file) which should include the packed contents(driver files) of the exe file along-with the inf you are looking for. Its just like unzipping.
You can get 7zip here: http://www.7-zip.org/download.html