You should only make sure the following at the Battery installation: When the installer asks you for the "Vstplugins" to install Battery into you should point the installer to the Vstplugins folder inside your Emagic folder on the hard disk. You should also make sure to allocate enough RAM to Logic when loading large kits into Battery VST. If you use larger kits in Battery (e.g. some of the Factory kits are more than 100 MB big) you should add the according amount of RAM to your Logic memory allocation. To allocate RAM, locate the application file of Logic (not the alias on the desktop) and press Apple key + I to open the Info window. Then enter more RAM under Memory/Preferred size. For getting more information about the general use of VST plug-ins under Logic, please refer to the Logic manual where the general use of VST plug-ins is described.