The issue have here is that the iSeries access install requires administrative authority. If you go to the IBM information center (http://publib.boulder.ibm.com/iseries/v5r2/ic2924/index.htm?info/rzaii/rzaiiinsormigmulti.htm) This link will show you a page close to the section that you are looking for. Migrate to the section titled silent install. Administering Service packs. they have a link to the information that you are looking for. It is a little vague, but I hope this at least gets you started in the right direction.