program that will automatically insert a character or word in a yahoo text box?

There are some programs that will automatically change a status or insert text into a room when it’s activated or closed, but is there any program available that will insert a formatted character or word after the enter key is pressed into the text field so it’ll appear again afterwards? I know tattoos are available in third party programs like yelite and such; but some of those lack features available in yahoo and I prefer the yahoo client interface.

Anyway, is there anything like that out there? Thanks.