In my book (which is written for Access 03) it says to:

Choose tools, then start up from the menu bar
Set display form option to main switchboard and click OK.

I have looked for over an hour and can not figure out how to do it... Help me please!

I am assuming by start up form you really mean you want to create a switchboard with buttons so that any database you design can be used by others who need not go into any of the design views of tables, forms, reports, queries etc. but merely click on a button to access the various elements. In 2007 version, the word switchboard has been changed to NAVIGATION PANEL. If this is what you mean, it is rather different and not quite as easy I think to use as previous versions because it more or less takes the control away from you, the user. Anyhow, to start the process off, merely press F11 function key to display the navigtion panel which will appear as a left pane. After that it is more or less the same as previous versions where you can either drag the elements you have already created or, if you want it to be so that users do not have too much control, as in previous versions, create macros for opening, printing or whatever you want users to be able to do, and then assign those macros to buttons.

If you have windows vista or xp, click the start button on the task bar, then click all programs. search for Microsoft office and click on access 2007 to start it.

Hope this is what you were looking for?