http://kb.vmware.com/kb/2010196 - This video provides an demonstration of how you can create a virtual machine in VMware Workstation for Windows using an existing VMDK virtual machine disk file.
This is particularly useful if you have downloaded a virtual appliance from the VMware Solution Exchange at https://solutionexchange.vmware.com
For further instructions refer to VMware Knowledge Base article 2010196.
A related blog post from our very own KBTV Intern Moses Masih is available at http://blogs.vmware.com/kb/2012/08/th...
In that blog post Moses provides some personal insights on how he used the VMware Solution Exchange to download a pre-configured Drupal installation and then followed the instructions in VMware KB article 2010196 in order to create a new virtual machine which used the existing VMDK files that were supplied in the virtual appliance.