I'm pretty sure I know what you're after but it doesn't quite work that way.
Basically you want to be able to type in:
"stuff $me other stuff" and hit enter. Then to have the script resolve the identifier. The problem is things are evaluated on the command line differently than they are in scripts. To evaluate something on the command line it must start with two of the command prefixes (/ by default) otherwise mIRC handles it like plain text.
You could use the on input event to look for known (or specific) identifiers and manually $eval() them get the desired display. Passing the data inside the on input event using 0, 1 or 2 /'s makes no difference.