Help for a little modify on Raindrops theme

At the moment I need to do a little modifications to Raindrops theme:
1.Change width of the left sidebar
2.Align all posts to the Center at the same time
3.Align to the Center All the Credibility Footer Section (Fixed)
4.Change the Color Font Tittle in Credibility Footer Section
(Now is black and the background is also black)
I Hope Someone can help Me, better in Spanish but English is good too)
Thanks !!!