Package name for client proxy

hi All ,

I am new to SAP .I am doing a PROXY > XI > FILE scenario .After generating Proxy when i try to save the proxy

It is prompting to specify the Package name and the prefix ,Can some one explain me the process how i should create

a package( I dont want to save it as local object). i have read in SDN that it should be a 4 level package .So if some one can give me Step by Step procedure

of creating a 4 level package that would be really great.