Use Winzip or WinRaR to make it zip. Just select all the files which you want to zip, right click on them & click on 'Add to archive'. Then select archive mode as ZIP & click OK. It gives you a zip file. This procedure is for WinRaR.
Here, you cant upload rar, 7z, exe or any other archive. Only zip is allowed.
i told, the car is in zip folder, but uploader opens it!Ultimate
WHile uploading, you have to select the zip & not right-click & press 'Open'.
and besides it opens and shows only readme fileUltimate
Maybe you havent added other files in the zip or your WinRar might be corrupted. Zip it again. I never came across this problem ever.