MiKTeX and proTeXt ⇒ Manually install a package without internet connection

[pdminh]

Hello,

I have a MiKTeX Portable Edition in order to typeset my documents anywhere. I am using many packages which are not included in the MiKTeX Portable Edition. So that I am finding some way to install any package manually without internet connection to typeset properly. Can anyone show me the way to do this?

Any instruction would be greatly appreciated. Thank you in advance.