[Chivas2973]

you have to make sure sh_batgirl.amx or sh_batgirl.amxx is in your plugins.ini(depending on if you use amx or amxmodx) then you need to be high enough level to see the hero, ex if you are level 5, you wont see level 6 heros, but the will show when you type herolist

finally, cvars go in the shconfig.cfg

post questions like these in tech support or general