Hmmm.. seems I used as a guide, the only icon on my desktop that utilises one of the generic .ico files, and these are the ones stored somewhere in the bowels of Windows in the SysRoot%...etc
On checking all the others, the icon file is without exception stored in the .exe folder!!
Only problem is, the folder that this shortcut points to is an HTML file that opens an offline web browser interface with my printer user guides in it.
Couldn't find a way to pop the ".ico" file in there, so I've had to settle for stuffing it in the printer driver file!
Just hope it's not buggered up my printer! lol
If anyone has a more conventional solution please let me know :-)