vmware workstation

There is some interesting in the releasenotes of 6.5.3
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Link to releasenote's
Workstation has been updated to power on the latest Microsoft Virtual PC files (.vhd). VMware recommends that you create a copy or linked clone of the image. If you do not create a copy, you cannot run the original virtual machine in VPC after running it in Workstation, because the virtual hardware layer has been modified.

So if im correct the vhd file's will be running without modding it?