How to Setup a Fedora 12 Virtual Machine
In VMWare Workstation, go to File > New… > Virtual Machine. As a non-standard configuration is required with Fedora, use the Custom option. Take the default option on the next screen and click Next.
You can now choose to use the physical installer disc or the downloaded ISO file, available via the Browse button. Either choice will result in VMWare Workstation informing you that it cannot detect the operating system that is going to be installed, so click Next to proceed and configure your hardware. Click Next through these configuration options, unless you have a specific requirement.
The most common alteration is to increase or decrease RAM, easily altered by selecting Memory and adjusting the slider on the right pane. Not that your virtual hardware is correctly setup, you can click OK and Finish for the virtual machine to power up.
Continue until you come to Select a Disk, and choose the Use a physical disk (for advanced users) option. This is done to overcome the problem Fedora has with virtual disks.
The Next button will then let you select a physical device and a partition, once you have made your choice here continue clicking Next until you come to Finish. Unless you clear the check box, the VM will boot up and detect your CD ROM.