G'day Joan,
this link http://www.memtest.org/download/4.00/memtest86+-4.00.iso.zip is the second link in the list. Download and unzip it to extract a memtest CD .iso file. Use your burner software to create a CD from the .iso image, it will be bootable without any further things to do. An .iso image is like a sector by sector Ghost image of the CD - it is exactly what the contents of the CD needs to be. Your burner software should hve an option to create from an image... It is important you create FROM the image and not simply copy the image to a data CD.

Boot from the CD and follow the prompts.


--=-- My credo: If it's worth doing, it's worth overdoing - just ask my missus, she'll tell ya laugh --=--
You're only paranoid if you're wrong!