I am using Win7 64 bit. Never had any issues with installing SkinVue either. All that was needed is to copy the SkinVue folder into /Program Files/e-onsoftware/Vue 11 Infinite or whatever version I was using at that time. Separate install of Python was not needed since version 9 if I recall correctly. This aplies to Vue Infinite. It could be that your issues are specific to xStream.

Ciao

TD