Thanks scook - yeah, that 5 step process is a more thought out way of what I was intending, and shows how convoluted it is... Most times I would probably not get past step 3 and just assume the Sonar doc is going to be the same as Cakewalk, and only dig further if it wasn't stacking up.
Good idea on the Registry Key and old CHM file - I'll give it a go and report back.