How can I change the display settings on the Motorola Droid?

I have the droid and I see pictures of other ones and the clocks and sometimes the unlock buttons are way different then mine. I think I would like them more than the ones I have now, but when I go and look to try and change them, there's nothing about it to change.

Thanks!How can I change the display settings on the Motorola Droid?
You have to download certain apps that come from the market such as lock 2.0 and beautiful widgets.