Changing something at the beginning of a novel is a risky business. The consequences may not become apparent until fifty thousand words later. Thank goodness for software like Scrivener (mac only, link on the left) that allows you to click between chapters and a corkboard with every chapter's synopsis laid out on cards. Saves a lot of fiddling with post-its and scrolling through yards of text.
What's also pleasing is that the company that developed Scrivener is based just down the road in Truro.
Now, back to the tweaking.