[Plugin: NextGEN Gallery] Customizing Pictures browser page

Hello,

I started a photogallery using NextGen Plugin and I would like to configure the photo browser Page to match the website´s look. I set up a test gallery for show you how the gallery is today (NextGen default style):

I´m new to CSS and WordPress customizations, so I would like to know how to:

1. Change the color of that “dark shadow” that covers the gallery when I click on a image to #E8FCDF. If it´s not possible, I would like to turn that “dark shadow” the most light possible.

2. Add a 6px solid border to the picture (color: #003300)

3. Change the navigation arrows position to the middle of the picture and use an image as a navigation button instead of those arrows (is this possible?)

4. Add a space between the picture and the image description and add a black background in description with 3px border color #003300

5. Change the description font to Tahoma, size 10px, bold, color #ffffff

6. Remove the photo number indication (18/19)

Thank you very much in advance for the help.