Theme development

I've googled this of course but I'm a little confused about how to do this because there are multiple ways. Of course I want to do it the "proper" way. How I'm doing it now is I'm adding stylesheets and scripts in the .info file like this-

hello ,

i'm a newbie in drupal , i have a working website with slideshow content types images . Why when i change my default theme ( zen ) to the Charity free theme ( http://drupal2u.com/2011/03/charitable-trust-free-drupal-template/) images stop to slide . help me please.
Thanks.

Hi everyone, I am a beginner. I had my site built by someone else. However I am trying to change my header image to an image I recently completed. I changed it once before thru my site but that isnt working. Any ideas? Thanks so much..

hola a toda la comunidad............................................
soy peruano y estudiante universitario, he desarrollado una pagina para una academia de mi universidad ................ he querido agregarle a esta pagina el servicio de web-conferencia y me tope con BIGBLUEBUTTON...........les cuento que mi universidad cuenta con un servidor en el cual he instalado ubuntu 10.04 DE 64 BITS , eso me aconseja hacer la pagina oficial de BIGBLUEBUTTON ............. lo que me falta hacer es ..........................

Is it possible to change the colors on the Jackson theme? I am new to drupal, and tried to change the colors in the style.css file but it didn't work.

Hi guys, I checked my site's recent log messages (admin/reports/dblog) lately and I found a strange problem.

According to the log, the error type is "page not found", the message is "undefined" and the user is "admin". When I saw the details, the LOCATION is my domain name, slash, undefined and REFERRER is my domain name. If my domain is abc.com, then the information for LOCATION is like http://www.abc.com/undefined and REFERRER "http://www.abc.com".