Drop-down list in MS Word

Using this MacBook, I have created a Template in MS Word 2004, and want to create a drop-down list containing perhaps 30 choices. The drop-down list available in Form Fields has a limit of 25 choices. There is an article at http://support.microsoft.com/kb/198561 explaining how to create a bigger combo-box, but I notice that the instructions in that article cannot be followed to the letter, because the steps that it dictates for the Entry Macro and the Text Form-field do not appear in this version of Word; and I certainly cannot get the result to work in the template.

I dare say that I have made some mistake through inexperience, but might it be that the version of MS Word in the Mac-version will not permit me to do what I am trying to do ?