I've considered this with my voices/personalities & discussed it with them. They can't "front", as far as I know, so I would be doing the typing for them. Although, I have found posts of mine here in the forums that I was surprised by & must have posted them while dissociated. And I wondered if one of my voices actually fronted & typed it. So far they claim they can't do that. At least they have no memory of anything like that. Have you asked three if he can operate the fingers?