Dismember is not a mod, in fact using the correct JA terminology the blood mod isn't a mod either, it's a package. A mod is a conversion to the game itself, like JAPlus or ClanMod or LugorMod. Secondly, dismember is a feature within the game already which you can enable without a "mod" or a package. Put this command into your console: -
/cg_dismember 6000