Thanx Thomthom and Holmes for your help, appreciate it.
You actually dont need to play around with the alpha
-in Environment tab in BOTH the Sky and background tabs, choose bitmap and place your HDRI.
choose environment as opposed to Texture on the top
Put your physical camera off and render!
you'll probably need to adjust your blur and multiplier values, as your first rendering will most likely be too dark or too light and blurry.
Jorge Barrero's 'V-Ray for SketchUp Tutorial - Sun & Sky - Beginner' on Youtube explains it nicely.
thanx again
If ever you guys are in South Africa give a shout, my email:
neospace.studio@gmail.com