1) Log into the account that "owns" the page you want to use.
3) In the left navigation bar, find the link "Ads and Pages". This can be the hardest part as it may be hidden under "More" Link.
5) This will take you directly to the edit page screen for the page, or pop up a selection box if there is more than one page.
6) a. Once on the edit page for your selected Fan Page, your address bar should look like this:
b. See the long number? ?id=111468492239835
c. 111468492239835 is this page's ID number.
NOTE: this should also get you the ID number for named pages.
7) Now copy this number into the widget where it asks: "Please enter Facebook Fan Page ID: "
8) Press check availability, it should say: "You can use this ID. <OK>"
9) Click "<OK>" and proceed with the creation of your new widget