How do I change the tracking/character spacing?

The HTML script you'll need for altering character spacing is as follows:
<StyleRun charspacing="n">

In this case, n stands for the number of extra points of empty space that will be put between characters. If you want to add 5 extra points of empty space between characters, you would enter:
<StyleRun charspacing="5">Text goes here</StyleRun>

You can also tighten up the character spacing by putting a negative number for n.