Donny ... maybe I am missing something, but I do not see how your instructions - which I are the steps I used to create my Pa600 songbook - differs from doing my custom songbook over ...

... and as for it being 'FAST' (???) ... I think we both know how many hours we spent getting the Pa600 gig ready ...
I could easily just load the Pa600 data into the Pa900 and use it 'as is', but as I said I would like to have my customized styles in more 'logical' order ...
BTW ... over the past year -through trial and error - I have gotten to know the KORG OS
fairly well, so , yes there are those 'locks' that one has to be aware of, and even more now that the VH comes in to play ...