I have VMWare Fusion installed on an iMac with Windows XP installed. I want to try Parallels before I buy VMWare. But, I do not want to lost the VMWare virtual machine because if I decide I prefer VMWare, I want to be able to delete Parallels and go back to VMWare without having to reinstall it.

I would appreciate any advice on how I can do the following:

Convert the VM Ware virtual machine to Parallels on the same iMac without losing the VMWare installation, thus allowing me to run either Parallels or VMWare.