WoodyZ, the "Mac OS X Server 10.6 64-bit.vmx" has many lines. I understand that I should just paste
uuid.action = "keep"
as the last line and save it. Right?
On the other hand, I hope the booting from the external SSD drive to boot two different Macs (one at work and the other at home) will not break it as dlhotka says.
Thanks for your help.