Cannot manage to align thumbnails with post excerpts

Hello everybody, First things first : thank you very much for this theme, which is (to me) very close to perfection. And thank you for the support which comes with it, I have already spent hours to fix various isues and most of the answers came directly from here ... Here is th site I am working on at present (please do not pay too much attention too all the stupid mistakes I made, I am completely new to website construction...) : http://www.paroquiansalagados.com.br/blog At present, I am trying to fix 4 different issues, the most urgent and important for me being the first one : 1. I know that this issue has been raised over and over again, I have tried everything I could do (as a newbie), and read pretty much everyhting related to thumbnails on this forum, but nothing worked : on my front page, how can I align my post thumbnails to the left of the post excerpts ??? is there a simple way to do that with the custom CSS ?? 2. Then, I would like to upload a nice and wide banner at the top of my site, which would include my logo but would be wider than the 300px wide limit allowed for logo (I know it is a stupid precision, since we are speakingabout a banner), but I did not find anything else than the logo uploading facility ... 3. I would like to fix my menu bar, so that when users scroll down, the menu bar remains visible on the top of the site (but not the banner). Is there a simple way to do that ?? Is that possible with this theme? 4. I also tried to replace one of the three little posts which are right under the slider (post hentry), by giogn into the theme options and to homepage featured content ... but nothing happened. I would like to link those three little images with 3 different pages of my site ... is there a better way to do it than going into the theme option? I know that it is a good lot, I hope you will find the time to answer even a little part of it.