If go to the libray. Under simulator primatives, try selecting the CSOURCE (DC current source) You also haveone there called VSOURCE
(DC voltage source) and alter it as per normal. Either double click it or right click and properties
Its about the only way I can see of doing it
i am talking about Dependent sources. Voltage controlled voltage source is available in proteus library but i don't know how to use it in the circuit is have posted in my previous post.
Take a look atthe EASY HDl help file in the labcentre folder.
A quick read looks like you can do it but being tired Ihaven`t read all of it will look later