Problem Solved
RESOLVED (and looks like it was my fault, at least in part) - 'mapping' exists in 'my computer' / 'tools' rather than via 'windows explorer' / 'network' / select machine / select drive (or folder) and then right click. The later being what it said in the manual I was reading (for mixed networks) and where I recalled it after doing the Vista bit. Application concern up and running fine now. Thanks all.