I am using Windows XP with Office 2003.

I need suggestions for the quickest, easiest possible method that requires
as few clicks as possible for the following:

Multiple users will open a spreadsheet and enter data into a few columns.
One column will need a pick list of some sort that will allow the user to
only enter certain specified entries (those in the list). Many rows will be
used, but the quantity changes every week. Each week the form will be cleared
and the entering begins again.

I know how to protect the column and unprotect it, etc. The issue is what is
the best way to display the pick list? A user form on a dialog box? One
single drop down on the sheet that populates the current cell? Any other
ideas? What is the best method?

Thanks much for any and all input.