I have a website http://www.swindonhapkido.co.uk which I created using the theme Dipdolt. I have been successful in editing the theme to a certain extent by going into the CSS file and other files and changing the code. (I have no experience in this, I just did educated guessing and trial and error!).
At the moment, the links in the sidebar show me the pages and their child pages. The child pages links are indented and dropped down slightly. What I would like to be able to do is even out the indentation, as at the moment it looks staggered. Also, make a bigger gap between the parent pages and lose the gap between the parent and first child page. I will try and make a mock up so you know what I mean!