Here you have my friend. Select any of theese, or both of them, and paste them in your engineer.cfg
First alias:
bind "key" "+aimsg"
Instructions:
hold "key" + mouse1 = detonate sentry
hold "key" + mouse2 = detonate disp
hold "key" + mouse3 = aim sg
Fill the "m1,m2,m3" aliases, with your current mouse config.
Code:
alias +aimsg "bind mouse1 detsentry; bind mouse2 detdispenser; bind mouse3 aimsentry"
alias -aimsg "m1; m2; m3"
alias m1 "bind mouse1 +attack"
alias m2 "bind mouse2 toggletwo"
alias m3 "bind mouse3 toggleone"
Second but this is not an alias, just put the keys you want.
Code:
bind "key" "detsentry" // Detonate Sentry gun.
bind "key" "detdispenser" // Detonate Dispenser.
bind "key" "aimsentry" // Aim Sg towards the crosshair