In Word 2007, AutoComplete suggestions only work for dates.
Note, however, that you can use AutoCorrect to insert contents
automatically. This isn't limited to text: so-called formatted AutoCorrect
entries can store not only formatted text but also text boxes, tables, and
so on.
To create such an AutoCorrect entry, first insert the the item that you want
in a document. Then select it and click Office button | Word Options. On the
Proofing tab, click AutoCorrect Options. On the AutoCorrect tab, type the
name of (the trigger for) your new AutoCorrect entry. Click Add, and then
click OK twice. If/when you are prompted to save your template, choose to do
so.