Membership shortcodes, pages, more detail i'm just searching

I would like to customize my register membership page. The other ones I might, but only for asethics, the register page is most important. The reason for this (and perhaps there is another solution to this) is I have some membership levels I don't want the general public to see. We have some people who have supported us in our start up and they are going to get 1 year to lifetime 'founders' memberships. But I don't want the general public signing up for those subscription levels.

Our levels will be monthly, yearly, stranger/visitor, and then also reporter and editor access levels - again I don't want people to be able to see how to sign up for being a reporter/editor on the registration page.

So, are there shortcodes for customizing the registration page such that I can control which subscriptions are displayed?