What I did was compress the "Your Projects" folder into a zip and then uploaded the zip to the site. Isn't this what you're supposed to do? Did I miss something?
Aah sorry, this is just a way to put settings into the engine, which is not necessary for now. but, apart from my mistake, yes, you just compress these files into a single zip
All right it works now but I had to use another website for converting the zip into iso. I also had to create a zip by selecting the files directly rather than zip the folder which contained the files.