How to assign Custom Property value that includes value of another Custom Property?

I have several Custom Property values that need to include the value of another Custom Property.  I am setting these values in the blueprint

For example the folder name includes the hostname in its value.

So if Hostname is "myHost", I want VMware.VirtualCenter.Folder to be myFolder\myHost

Based on an example I was given , I have tried:

{Hostname}\myFolder\

and

{Hostname}\{myFolder}\

Does substitution / evalation of Custom Properties work in 6.0?