I'm trying to install VirtualBox, but it is asking for me to insert a cd into media/cdrom. However, I installed my Ubuntu OS from a USB. It does not allow me to change location. How do I make it read my OS install info from my USB?
There is an option in Virtualbox of using a raw disk. Details can be found here... http://www.virtualbox.org/manual/ch09.html#rawdisk
This is what you're looking for out of that page...
VBoxManage internalcommands createrawvmdk -filename /path/to/file.vmdk -rawdisk /dev/sda