This is a short guide to getting your virtual machines you made in workstation 9 to working in 8, and possibly versions later in the future.
First you will need to install a notepad program of your choice, such as Notepad++ you can get this program here: Notepad++ Home
Next navigate to C:\Users\USERNAME\Documents\Virtual Machines\VM NAME
Once there locate the .vmx file for the virtual machine:
Right click it and open it with notepad++
Once the file is open find this line and change the number from "9" to "8"
Save and close the file. Open VMWare and the machine will now work with Workstation 8.
I made this because a friend of mine had VMware 9 trial but only a licensed copy of VMWare 8. So after downgrading his VM's did not work. This corrects issue.