I use IS Boxer to send keystroke actions with the lettres of my charnames.
So I need 2 steps to invite 1 char:
e.g.
step 1: "enter" / i n v i t e "space" "charname"
step 2: "enter"

Needs two steps 'cos you can't send "enter" twice in one step.
Setting up takes a little time but it's worth the effort.

cheers, M.