Modifying the post screen to have more fields

Hi,

If it is possible I would like to have more fields in the write post page like the title text box, and have the contents posted above the post text.
i.e. the post screen would look like so
Write Post
Title
|____________|
extra field 1
|____________|
extra field 2
|____________|
Post
| |
| |
|____________|

I had a look in the wp-admin/post.php file but could not understand what was going on (sorry php amateur :P).

I presume that this modification would require me to add new columns to my mySQL posts table and that is pretty simple to do, its just the php that I cant figure out.

I hope this all makes sense and if anyone could point me in the right direction that would be great.

Thanks in advance