Forums mIRC Help Trying to understand

Not only am I new to here but also to mIRC.
I am using Magick^Knight6 and want to configure.
When chatting, there is some expansion of words that happen...ie if I type "Haa", press <Enter>, its expanded to "Ha Ha Ha Ha Ha Ha". Its a really convenient feature but........
How do I edit whats going on with this. For example, I only want "Haa" to expand to "Ha Ha Ha", alternatevly, I want to change some of the shortcuts from (example) "Haa" to "Ha"
Help is needed
thanks

We support the mIRC chat client but we don't support third party scripts. That completion feature is part of the script you're using. You'll need to contact the author or see if there are any support forums/channels, because we don't know anything about it.

I dont fully understand it but I get the idea I think.