controlling fields on a form

I am using Word 2003 to make a form and put in some fields. There are a
couple of things I am unable to do, however.

When data is input into the field by the user, text below the field is
pushed down. How do I control the field so it does not affect surrounding
text? I would like to set the field at a maximum length (I can do this) and
not have the other text on the form get moved.

Finally, the fields I insert are of a fixed length, about 1 inch. I double
click on the field and can set the maximum length, but the default size of
the field remains at about 1 inch. Can I get the grayed field area to
display at its full size so the user can see how much room he has for his
response?

Thanks