Change "grey weight" fields in Add / Edit screen

Hi all,

I'm using Drupal 5.7.
I have several content types and several vocabularies.
When I add or edit a node of, say, content_type_1, the first field to insert is the Title, with a weight of -5. The second field(s) is/are taxonomy fields, with a weight of -3. Then comes the Body, with a weight of 0. These three weights are "greyed out", i.e. I cannot change them in the Admin section.

This order is a bit awkward:
Question 1: I would like to use Title / Body / Taxonomies, not Title / Taxonomies / Body, as it is now. But where do I change the order??

Furthermore, the assigned weight of Title, -5, which should come on top, makes it impossible to make use of weights "lighter" than -5, i.e. -9 up to -6 are always empty. When you have a lot of CCK fields, it would be nice to not be compelled to waste these weights.
Question 2: How can I assign -9 to "Title", and -8 to "Body"??

Anyone out here willing to shed a bit of light on these 2 questions?