I use ultraiso in creating ISO files, use whatever you want.
Open up the ISO file, then in left side window where all the numbers are ( volume id from isoinfo ) this is where it must say D3_2. Correct the label then re-save the iso. Then re-check it with isoinfo again..
In the screenshot below whats circled in red is wht should read the d3_2. In my screenshot it says shogun2_1, as its the iso file for shogun2_1 ( conversion done for that dvd9, from another topic)
your almost there !!!
And you've learned an important lesson, READ the conversion step by step.
IF you have to print it off and check-off each step as you complete it. If you dont understand a step then post back in that topic BEFORE you start the conversion, NOT after you've done it, thinking you did it right. KNOW what each step means, clearly before proceeding. Then once you've done it & it works correctly, by testing the install & uninstall, pat yourself on the back for a job well done..
There are lots of us here, willing to help and the only way to learn is to ask questions, if you dont understand something. good luck