No x_sgs_x ISOFILE is the part you need to replace with the name of the ISO so if you're using an ISO file then you need to rename to what its called for example if the ISO is called SIM3 then type in "SIM3.iso". Now the question is are you using the actual DVD or an ISO? We need to know to get a better understanding of it, if the file is ISO is it just in standard .iso or other formats like .mdf or something different.
