You have to find a way to ssh into the server and run it through the command line. The path depends on where magento is installed. Once you find your install, go into the shell directory and run php -f ScalaDropshipping.php – import. I'd ask whoever hosts your site to help out with that.
Dataflow probably won't work unless there is an actual profile for it specifically or you know exactly what parameters to give dataflow to get it to work.