[Shamun]

Use notepad++ to edit the files (css, .tpl etc). Best to use notepad++ over wordpad,notepad, microsoft word etc because it has different language syntaxes built in. It also doesnt insert extra characters and also handles new lines correctly.

Then you will be using firebug to mess around with your css. In the bottom right of firefox, you will see a little bug. Clicking that will activate firebug and some of the panels.
In the HTML panel, you can see how everything is nested and if you click on a div then firebug will immediately show that divs css styling and parent elements.