1st: All you can do is to set "grenadeffire" 0, so you cant kill teammembers with grenades, though you cant disable what you actually were looking for.
2nd: "set floodprotect 0"
What do you mean by "grenade commands" ? The only one that might be important for a normal server is "set gren_explodeonimpact 0/1".
0 disables impact grenades, 1 enables them.
You shouldn't need to change any other grenade settings. ( Though, If you still want to you should be a little bit more precise on what you want to do.
