Hi Robinez
I think i have a handle on it now.
So converting songs to play correctly they have to be in the key they were originally made and as you say the machine knows where to go when playing chords after you have gone that route.
Am i in the ballpark now?
This Genos program will also make your life easier as making styles using Cubase is a little long winded.
I am still waiting for my Genos 2 and the wait is agonising. Hopefully this week , but it is what it is, patience.
The wait also has been so long for a decent stylemaker.
It is always essential to know the ins and outs otherwise i will be floundering
All the Best
John and thank you very much for your time to explain, much appreciated. 
Ps I will also take the time to learn the programs nuances!! 
Hi John,
It is hard to get your head around at first but this programme is a lot more easy and successful once you start to see what going on by trial and error in some cases. The assumption about Cmaj in my experience is based on when your create styles in Genos that everything must be in C. It has been explained that it is not always the case.
Other programme I never got my head around them as even my first attempts failed but with this way much better, in some case you can create a style in under 10 mins! with minimal effort and depending on the complexity of the midi.
All I do is check each section is in the key I want, test each one with my keyboard input and double check before saving, and even mess with the melody lines (active for main etc) and walla! even major melodies going on in the background in some cases.
Some bar lengths need changing in some, no big deal and intros/endings extending and breaks.
This programme makes it a lot quicker and enjoyable than ever, recently I spent more time creating styles than actually playing! Its a case of what can I do next?
The only trouble I have found, perhaps some instruction required is changing the octaves in some channels, not had much success with that yet.
Maybe Robinez could help with that if he is willing to do a part 2?
Keep at it and it will just click! the eureka moment!
I have also found it save some work if its cleaned up before I load a file, load a midi into PSRutti and click XG, that takes out unwanted notes etc in seconds and then change the whole midi if required to the key you want or play in by clicking Transpose in seconds.
save it, then I move it into Yamaha Megaenhancer and it recommends what changes to make to the voices for Genos to save doing changes in Midi to Style later, and sounds much better when you first here it in Midi to Style. No time at all just a couple of minutes.

Des