Hey Lyne, I've been using the HCS since Joe came out with his 2014 version, and this new version is even better, because there's fewer steps.
To answer your question about the morphs created for the original hair, that's one of the steps in the process, and it even allows you to create a copy of the thumbnail with the name Dawn on it, so you know exactly which character it belongs to. I happen to have all my V4 hairs in my DS3A Runtime, but I'm saving all my Dawn converted hairs in my P9 Runtime, so there's really no confusion, but I still like to have the separate thumbnail with her name on it.
That all said, I'm not sure I've tried converting any of my V4 hairs to a "morphed" Dawn. IOW, I haven't really created any of my own Dawn characters, so I'm not sure if that's an issue. I did recently convert a short V4 hair for Dawn with the hopes of then adding a "fit" for Diva, but I don't recall if the hair was a character hair (cr2) or a prop hair (hr2). If it's a prop hair, I can't "copy morph" from Diva to the hair, as that only works on character hairs.
You CAN always make slight adjustments once you have the hair fitted to your character BEFORE you save it, so it gets saved to your Hair Library with your adjustments included.
To answer your question about the morphs created for the original hair, that's one of the steps in the process, and it even allows you to create a copy of the thumbnail with the name Dawn on it, so you know exactly which character it belongs to. I happen to have all my V4 hairs in my DS3A Runtime, but I'm saving all my Dawn converted hairs in my P9 Runtime, so there's really no confusion, but I still like to have the separate thumbnail with her name on it.
That all said, I'm not sure I've tried converting any of my V4 hairs to a "morphed" Dawn. IOW, I haven't really created any of my own Dawn characters, so I'm not sure if that's an issue. I did recently convert a short V4 hair for Dawn with the hopes of then adding a "fit" for Diva, but I don't recall if the hair was a character hair (cr2) or a prop hair (hr2). If it's a prop hair, I can't "copy morph" from Diva to the hair, as that only works on character hairs.
You CAN always make slight adjustments once you have the hair fitted to your character BEFORE you save it, so it gets saved to your Hair Library with your adjustments included.