help protecting spawn from a plugin (help needed)

i just put in eggrenade for my pvp/factions server, and it can be used at spawn. i want people able to use it mabey just in war or sertain areas, but i dont know how to make it so the spawn doesnt get greifed by special explosions. this is the plugin http://forums.bukkit.org/threads/fu...1-rerelased-after-months-of-inactivity.11561/
and i do have world guard, is there some kind of addition or something i can use to protect against special explosions. i love the plugin and want to avoid getting rid of it, because i made a bloodgulch (halo 1 map) map for war and i want to get it as much like the halo experience as i can...without playing halo...any help?

 

With world guard you can add flags to region. There is an explosion flag I'm pretty sure so you would type //region flag spawn explosion deny.
I'm pretty sure the flag is called explosion but double check on the world guard wiki first.

 

no i didnt see it in the flag list, i also tried it and it didnt work