[wp-hackers] Fine tuning object position

[Mário Gamito]

Hi,

Ok, I've managed to insert a checkbox and a picture in the write article 
page.

But as you can see here:
http://www.absinto.org/images/sapo_tags.jpg

The check box and the green little picture is in the bottom left corner.
I'd like to have them where the red rectangle is.

I can't fin nothing similar to manage_posts_custom_column but applied to 
rows.

Does anyone knows how to do this ?

Any help would be appreciated.

Warm Regards,
Mário Gamito