What he wants is to be able to create an alias named /foo and be able to call it with /foobar, in much the same way as /timer can be called with /timername.
This idea would likely be quite difficult to implement and slow once implemented. I can't think of any situation where having it would be a significant advantage.
And, of course, what would there be to tell mIRC what is the alias and what isn't? A script could have both /foo and /foobar as aliases (or separate scripts). It's not like you're making a program that runs on its own and you know exactly which commands (aliases) will be used, so can do something like that.
