HTML help..anyone?

I confess - being a database person is lot more easier than a web designer..I can come up with Oracle contents easily but its so hard to make this blog wider..Have looked around every single template and changed them so many times ..but still cant get the main section (body/subbody whatever its called) to expand..

I would typially like it not to eat up the spaces by itself - so that sql code would look little readable..

I even opened up the template code (HTML)..all width entries matches with some px value (pixels?) ..I thought they usually put in characters..(last time I checked HTML tags was around 5 years ago :) )

anyway , if there is anyone willing to make this blog more wider & readable, you are more than welcome..