It will be a tight squeeze. It may be better to just install ESXi on your workstation and see if it works. You will be surprise to see that there are many devices out there that are not on HCL but they work. If it works, you can take advantage of ESXi smaller memory overhead compare to your windows 7 or XP and ESXi has memory management (TPS, compression, etc) to squeez in more VMs. I highly recommend using SSD for better performance.
David