I agree with Jobe as to the usefulness of adding CTCP version replies to each bot, let alone custom ones. CTCP is a completely optional protocol and is not required by RFC1459 or 281x. To me that's needlessly wasting resources not to mention the time wasted just coding the ability on vanity that most people could careless about. Personally, in the last 12 years I've never had the desire to CTCP VERSION NickServ.
I can understand the desire for customizing Nickserv's nick, username and host. That at least can be seen on a regular basis. As Jobe also pointed out, ircd aliases point to nick@server which means it doesn't matter if NickServ's nick is CheezyPoofs from
teh@authoriteh.gov, the alias will still point to nick@ServerName.
I have not tested this yet, but you might want to try changing NickServ's username and host if your ircd has /chghost type commands like Unreal does. Like I said, never tried it so test it on your own risk.