I have the same problem.
The very name "standalone converter" is confusing. It leads me to expect an application that will boot and run on a PC from say a USB or CD, or even a set of floppies and then create a runnable disk image from that PC.
I have plenty of USB sticks here with various flavours of Linux installed that will boot my old laptop very well. All I want to do it stick a Vmware convertor on there as well, run it and get an image I can play with VMPlayer.