We are not familiar with Winpopt.
IQR Tools provides a convenient interface to PopED. Version 0.4.0. Not tried with 0.5.0 yet.
The interface facilitats setting up the popED object tremendously. Also it allows for very easy coding of models of interest.
We have not focused on handling IOV though.
PS: When using IQdesktop the correct PopED version is already installed and you should be able to run the example in the book right away.