Customize Category Pages and Tooltips

I'm trying to customize my cart further and would like to know which files I need to update to accomplish the following:

 

1. Lessen the gap between the products table and the dynamic page numbers that appear for allowing a customer to browse multiple pages of products.  I recently scaled my thumbnails down to a smaller size so when a category page shows (with products of course) the gap between the multiple product page navigation and the first row of products has increased and created too large of an area of white space.  What file and code would I need to scoot the table of products up a bit.

 

2. Right now, my ajax tool tip shows the thumbnail image of my products.  I would like it to show the product detail image instead.  (the one that displays on the product detail page).  How do I go about pointing my tool tip to the other images.  I'm assuming the tooltip graphic will automatically scale larger to display a 200-300 pixel image within it?  If not, any advice on this topic would be appreciated.

 

Thank you!

Doug

Thank you for your help.  Your pixel estimation was perfect!  thx tons!

 

Doug