well to fly you use est_jetpack userid 1 and if your good set a keyvalue to flying 1 so that things like ladder glitch adn such can be avoided as well as fixing aim.

in terms of your question about ability. You can use player_say or go into the ability block of wcsabilities, although I coded a seerate config on our server to jsut put player_ability where you put player_spawn in the eswcs.txt so that it is less work to make abilities.