Now that I have Cynagonmod 7.0.3 I want to know how to flash a theme to it?

[Casutherland42]

I just used ROM manager on my new rooted phone to flash the Cynogenmod 7.0.3 onto the phone. Now I am curious how I can flash a custom theme on to the phone without much work, simple instruction, and keeping all my current apps and contacts. Was this the best way to get the Cynogenmod to begin with or not? Just am looking for a few answers to my questions.