Yes, it is a long complicated process that downloads a series of files, edits them and re-uploads them. It's a process that my company uses to update a certain section of their website.
I believe I found a DDE type application, but it doesn't work with Mirc (for some reason?), maybe you can shed more light on it?
See here:
http://wwwthep.physik.uni-mainz.de/~frink/nt.html(about half way down)
You can use it to send "keys" to applications. Works with things like Notepad or Command Prompt, but not Mirc
