You talking about a program that fills out the personal information for account creation? I haven't herd of anything of that sort of thing. Just bots that can complete tutorial island.
Your best bet is to make a very intricate mouse recording with copying and pasting from a document into the applet. Even then I think you might be stuck, because I'm pretty sure Jagex blocks how many accounts you can make in a given amount of time.
As said above this is near impossible unless you was to somehow inter-mingle it with a proxy service thing aswell which is very hard as Jagex have started to block the amount of accounts you can make on one Ip over a short amount of time.