Well first you need to see just exactly how much of a difference your board has. It may differ. Set something in the BIOS and then go in windows and see what CPU-z shows for Voltage and then you will know

Highest voltage would partially depend on temps but I would not use more the 1.5 Actual on a 65nm CPU

ISO image is for burning to CD and must be burned in a special way. Google how to burn ISO for program and directions. But since you have a floopy you can use that you just have to use the floppy files posted on the page not the ISO.

Here is what you need for floppy, unzip and add all files inside to floppy. >>>
http://www.memtest.org/download/2.01....01.floppy.zip