I stopped using virtualbox because of 2 really annoying bugs and also, not a lot of programs work in vbox, for example, there was like 5 rescue disks that would not work in virtualbox. Since I switched to vmware, I havnt got a single problem running rescue disk's. I always liked vmware more, but I got used to vbox because of linux!lol
ANYWAYS, I put the iso under "CD/DVD" when you right click on the vm that you created and click settings and I put a tick mark on "Use Image Iso File." Vmware and Vbox should be similar the way I did it in vmware. This is probably all confusing, can you wait for a video that I will create soon, eaither today or tomorrow?