I miss Xang's rooftop rocket server.
You should make it Left click is jump rockets, and Right click is actual rockets.
I wish it were possible to make there be no damage whilst firing an impulse. I'd totally make a giant fan weapon and blow people around.
I remember some skyline RJ/Sniper DM a long time ago hosted by some original player (ie id under 1000) where you had something exactly like this and a sniper rifle.
Projectiles don't have to do damage, neither do explosions. Just set all damage values to 0.