Technically it might be possible, but it is, somewhat, dependent on the methods that messages can be sent to your cell phone.
Eg: I can't set up mIRC to send a text message to my cell phone using my provider's website, due to the fact that the messaging system from the website requires an authorization code, which is generated at the time of the message to be sent. You've probably seen the type of thing I'm talking about where there's a sequence of letters and numbers that have to be entered, but they are shown to you as a picture, so you can't just copy & paste the code.
However, my provider does support messages sent to my phone using an e-mail format of myphonenum@provider.com
and mIRC can be set up to send messages like that, using something like
/url -n mailto:email.address@provider.com?subject=Subject
with the ?subject=Subject being optional.
