Is this still possible as I have 3 render slaves to do also ?Of course it is possible, why wouldn’t it?
Where do I find the Multiscatter update for Max 2014 and Vray 2.3 ?Generally, V-Ray 2.3 and V-Ray 2.4 have compatible SDK, so you don’t need a special version of Multiscatter for V-Ray 2.4. Also, plugins for 3ds Max 2013 are generally compatible with 3ds Max 2014, so you may not need a special version of Multiscatter for that either - but it would be best to ask the Multiscatter guys.