If you need to create an USB installation key with Vmware 6.5 you simple need to have:
Vmware 6.5 ISO download
Netbootin ISO to USB tool download
Once you have download .iso you need to put Netbootin link to usb as following image and proceed with USB creation.
about USB and CD tools you can review these blogs sections:
http://www.alessandromazzanti.com/search/label/CD%20Live
http://www.alessandromazzanti.com/search/label/USB