imanager2.7-custom plugin

Question

Hello I am working on i-manager2.7 aproduct of Novell on windows7 platform. I am trying to customize the plugins created in plugin studio of i-manager. The plugins created by plugin studio are .npm files, which is a buble of three files install.xml,maifest.mf, plugin.xml and a .jsp file. I want to cutomize this .npm and install it back into the imanager. I am new to this technology. Any help would be appreciated. Thanks.